pitting corrosion of aluminum

    

                      

       



                                                                                                        

 

                                                                                                                                                                                                                                                                                               



            

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             

        

 

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                                                                                                                                                                                                                                                                                                                                                                                                                                                   

       

                                                                        



        

                                                                               

                                                                                                                                                                                                         

  

                                                                                                                                                                                                

        

 

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                                                                                                                                                                                                                           

              

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        

                           

                                                   

                    

        

 

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                                                                                                                                                                                                                                                                                                

                                                    

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        

                

                    

 

                                                                                                                                                                                                              

        

 

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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            

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        

                                                                                             

    

                                                                                                                                                                                                                                                                                                                                                                                                                                   

        

 

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                          

                                                                                                                                                                                                



        

                

                                                                                                                                                                                                                    

        

 

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                           

  

                                                                                                                                                                                                                                



        

                                                                                                                                                                                                                                     

   

                                                                                                                                                                                                    

       

        

               

        

 

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                                                                                                                                                                                                                                                                                                                           

                         

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        

                                                                                                                                                                                                                                                                                         

 

                                                                                                                                                                                                         

        

 

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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

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        

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            

        

 



                                                                                                                                                                                                                                                                                                                                                                                                                                                               



        

               

                                                          

             

        

 



                          

                                                                                                                                                                                                                                                                                                                                      



        

 

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        

        

 



                                                                                                          



                

              

     

                                                                                                                                                                                                                                                                                                 

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        

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

        

                 

 

                                                                                                                                                                                        

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