AS 1627.7-1988
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AS 1627.7-1988 1627.7-1988 Metal finishing - Preparation and pretreatment of surfaces surfaces - Hand tool cleaning of metal surfaces
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AS 1627.7—1988
Australian Standard . d e t i b i h o r p k r o w t e n n o e s u r o n o i t u b
Metal finishing—Preparation and pretreatment of surfaces Part 7: Hand tool cleaning of metal surfaces
AS 1627.7—1988
Australian Standard . d e t i b i h o r p k r o w t e n n o e s u r o n o i t u b i r t s i d , e g a r o t S . y l n o e c n e c i l r e s u e l g n i S . 2 0 0 2 n a J 3 2 n o H C I N A P A R A H T N I R A W o t d e s n e c i L
Metal finishing—Preparation and pretreatment of surfaces Part 7: Hand tool cleaning of metal surfaces
This Australian Standard was prepared by Committee MT/9, Metal Finishing. It was approved on behalf of the Council of the Standards Association of Australia on 30 August 1988 and published on 12 December 1988.
The following interests are represented on Committee MT/9: Aluminium Development Council Australasian Institute of Metal Finishing Bureau of Steel Manufacturers of Australia Confederation of Australian Industry . d e t i b i h o r p k r o w t e n n o e s u r o n o i t u b i r t s i d , e g a r o t S . y l n o e c n e c i l r e s u e l g n i S . 2 0 0 2 n a J 3 2 n o H C I N A P A R A H T N I R A W o t d e s n e c i L
Department of Defence Metal Trades Industry Association of Australia Royal Australian Chemical Institute Society of Automotive Engineers Australasia Australasia Telecom Australia University of Queensland
Review of Australian Standards. To keep abreast abreast of progress in industry, industry, Australian Standards are subject to periodic review and are kept up to date by the issue of amendments or new editions as necessary. It is important therefore that Standards users ensure that they are in possession of the latest edition, and any amendments thereto. Full details of all Australian Standar ds ds and r elated ds Australia Catalogue elated publications will be found in the Standar ds of Publications; this information is supplemented each month by the magazine ‘The Australian Standard’, which subscribing members receive, and which gives details of new publications, new editions and amendments, and of withdrawn Standards. Suggestions for improvements to Australian Standards, addressed to the head office of Standards Australia, are welcomed. Notification of any inaccuracy or ambiguity found in an Australian Standard should be made without delay in order that the matter may be investigated and appropriate action taken.
This Standard This Standard was issued in draft form for comment as DR 86029.
AS 1627.7—1988
Australian Standard . d e t i b i h o r p k r o w t e n n o e s u r o n o i t u b i r t s i d , e g a r o t S . y l n o e c n e c i l r e s u e l g n i S . 2 0 0 2 n a J 3 2 n o H C I N A P A R A H T N I R A W o t d e s n e c i L
Metal finishing—Preparation and pretreatment of surfaces Part 7: Hand tool cleaning of metal surfaces
First published as CK9. 7—1967. Revised and redesignated AS 1627.7—1977. Second edition 1988.
PUBLISHED BY STANDARDS AUSTRALIA (STANDARDS ASSOCIATION OF AUSTRALIA) 1 THE CRESCENT, HOMEBUSH, NSW 2140 ISBN 0 7262 5268 9
PREFACE
This Standard was prepared under the direction of the Association’s Committee on Metal Finishing, to supersede AS 1627.7–1977, Preparation and pretreatment of metal surfaces prior to to protective coating – Hand cleaning of steel s urfaces. This Standard is one in a series of Standards covering the preparation and pretreatment of metal surfaces metal surfaces used in metal finishing. Others in the series are as follows: AS 1627.0 1627.1 1627.2 1627.3 1627.4 1627.5 1627.6 1627.8 1627.9 1627 1627.1 .10 0
. d e t i b i h o r p k r o w t e n n o e s u r o n o i t u b i r t s i d , e g a r o t S . y l n o e c n e c i l r e s u e l g n i S . 2 0 0 2 n a J 3 2 n o H C I N A P A R A H T N I R A W o t d e s n e c i L
— Method selection guide for preparation preparation and pr etr eatment of steel surfaces etr eatment — Degr easing easing of metal surfaces using solvent or alkaline solutions — Power tool cleaning of steel surfaces — Flame cleaning steel surfaces — Abrasive blast cleaning of steel surfaces surfaces — Pickling steel surfaces — Phosphate treatment of iron and steel surfaces — W ash primer pr etr etr eatment eatment of metal surfaces — Pictorial surface preparation standards for painting steel surfaces. — Cleaning and preparation of metal surfaces using acid solutions (non immersion).
CONTENTS Page
FOREWORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SECT SECTIO ION N 1. 1. 1.1 1.2 1.3 1.4
2.1 2.2 2.3 2.4 2.5 2.6
SCOP SCOPE E AND AND GENE GENERA RAL L
SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . REFERENCED DOCUMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SURFACE REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECT SECTIO ION N 2. 2.
3
4 4 4 4
METH METHOD ODS S OF OF OPER OPERA ATION TION
EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PRELIMINARY CLEANING AND DESCALING . . . . . . . . . . . . . . . . . . . . HAND TOOL CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FINAL CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPLICATION OF COATING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 5 5 5 5 5
APPENDIX A. PURCHASING GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7
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AS 1627.7—1988
FOREWORD Hand to ol cle ani ng ng can be an accepta bl e met ho hod of sur f ac ace prepar at i on on f or or mi ld in te ter iio or a nd nd e xt xt er eri or or a tm tm os os ph pher iicc e xp xpos ur ur es es, a nd nd f or or m an any m ai ai nt nte na nance s it it ua uat io ions where pai nt nt s of good w et ett ab abi li li ty ty are used. Hand to ol ol cle an ani ng ng i s t he he l ea east ef fe fecti ve ve meth ethod of surf urface ace prep prepar araation tion for for durabi rabilit lity y of pain paintt coat coatiings ngs. Hand t oo ool cl ea eani ng ng i s an expens iv e, l im im it ite d cl ea eani ng meth od whic h i s s l ow ow and phys hysicall ically y ardu rduous ous, and and shou hould only be con conside sidere red d whe when powe powerr too tool or abra brasiv sive blas blastt clea leanin ning meth ethods ods cann canno ot be used sed. Thes Thesee meth metho ods are are fast aster and and more more effec effectiv tive. e. It w il ill not r em em ov ove al l re si sid ue ues o f ru st st o r o th ther c or orr os osi on on pr od oduct s, s, n or or w il il l i t re mo mo ve ve fi r ml y adher ent mi ll s cal e. F or s mal l l i mi t ed are as, such a s s pot cl eani ng f or main mainten tenan ance ce primi priming, ng, hand hand clea cleani ning ng may may suffi suffice ce,, even even for for paint paintss requi requirin ring g very very clean clean surfaces.
. d e t i b i h o r p k r o w t e n n o e s u r o n o i t u b i r t s i d , e g a r o t S . y l n o e c n e c i l r e s u e l g n i S . 2 0 0 2 n a J 3 2 n o H C I N A P A R A H T N I R A W o t d e s n e c i L
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AS 1627.7—1988
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STANDARDS ASSOCIATION OF AUSTRALIA
Australian Australian Standard Standard METAL METAL FINISHI FINISHIN NG—PREPAR G—PREPARATIO ATION N AN AND D PRETR PRETREAT EATMEN MENT T OF SUR SURFACE FACES S PART 7: H AND TOOL CLEANING OF METAL SURFACES SE CT CTI ON ON 1. S CO CO PE PE A ND ND G EN EN ER ERA L
1.1 SCOPE. ThisS tanda tandard rd descr describe ibess procedu procedures res and and equip quipme ment nt for for the the pre prepara parati tion on,, by hand hand tools tools,, of meta metall sur fa ces t o w hi ch prot e ct i ve coat in gs a re to be su bs bse qu quent ly ly a pp ppli ed ed, and spe ci ci ffii es es s ur ur fa face f iin n is is h requirements. . d e t i b i h o r p k r o w t e n n o e s u r o n o i t u b i r t s i d , e g a r o t S . y l n o e c n e c i l r e s u e l g n i S . 2 0 0 2 n a J 3 2 n o H C I N A P A R A H T N I R A W o t d e s n e c i L
NO TE TE : A pp pp en en di di x A co nt nt ai ai ns ns ad vi vi ce ce an d re co co mm mm en en da da ti ti on on s o n in fo fo rm rm at at io io n w hi hi ch ch shoul d be suppl ie ie d b y th e pu rc rc ha haser a t th e ti m e of in qu qu ir ir y o r o rd rd er er .
1.3 DEFIN DEFINIT ITIO ION NS. F or t he pur pose Stand Standar ard, d, the the defini definitio tion n below below appl applie ies. s.
of t hi s
ng m et a l Hand tool cleaning clean ing — a m et hod of pre par iin sur fa fa ce ces pri or or t o pain ti tin g, g, by r em emovi ng ng l oo oos e m il ill sc al ale , r us ust or o th th er er c or or ro ro si sio n p ro ro du duc ts ts a nd nd p ai ain t, t, b y mea ns of h and wi re re brushi ng ng, hand sandin g, hand scr api ng, hand c hip pi ng ( see F orewor d) or a comb combina inati tion on of these these metho methods ds..
1. 2 R E FE FE R EN EN C ED ED D O C U M EN EN TS TS . T he docume cumen nts belo elow are are refe referrred to in this this Stan Stand dard. rd.
1.4 SURFACE SURFACE REQUIRE REQUIREMENTS. MENTS.
AS 1627
1.4. 1.4.1 1 Steel. Steel. S ur urf ac ace s sh al al l b e p re re pa par ed ed to c om omp ly ly with one one of the the follow ollowin ing g clas lasses, ses, as spec pecified ified::
1715 1716
Code of prac ti ce f or pr epar ati on and pre tr ea eat ment of meta l s urf ac aces pr io r to prote protect ctive ive coati coating ng Pa r t 1 : De grea si ng of m eta l s urf a ces usi ng s ol vent or al kal i ne solutio olutions ns (AS (AS 1627 1627.1 .1)) Pa r t 9 : Pi cto r ia l sur fac e pre par at i on st a ndards f or pai nt i ng s t eel surface urfacess (AS 162 1627.9) 7.9) Se l ect io n us e a nd main t ena nce respi respirato ratory ry protec protective tive devic devices es Res pi ra t or or y prot ec ecti ve ve devi ce ces
of
(a ) Cl as ass 1— al l l oo oose m at ate ri ri al al re mo moved. (b ) Cl as ass 2— al l lo os ose m at at er eri al al r em em ov oved , pl us us s om ome poli polishi shing ng or scrat scratchi ching ng to bare bare meta metal, l, pr oducing at l ea east a n equiva le nt t o St 2; s ome areas may be equiva le nt to S t 3. (S ee ee A S 1627.9. ) Surface prepar preparatio ation n 1.4.2 1.4.2 Metals other other than than steel. steel. Surface is to b e s pe pecif i ed ed. NOTE NOTE:: Guid Guidan ance ce on surfa surface ce prepa prepara rati tion on of light light meta metals ls is give given n in Ta bl bl e 2 .2 .2.
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SE CT CTI ON ON 2. MET HO HO DS DS O F O PE PE RA RAT IO IO N 2.1 EQUIPMENT. EQUIPMENT. H an and c le le an ani ng ng to ol ol s c on ons is is t of chip hipping ing ham hammer mers, hand and scrap crapeers, rs, wire bru brushe shes, and and surf urface ace coa coated ted abr abrasi asives. ves. Spec Specia iallly shap haped scr scraper aperss are som sometime etimess nece necesssary sary.. Tungs ungstten carb carbiidede-tipp tippeed sc ra rape rs rs ar e re co comm en en de ded f or or u se se on s te tee l s ur urf ac ace s onl y. y. Ch ip ip pi pin g h am amm er er s sh ou oul d not be used o n l ig ig ht ht metal metal surfac surfaces es.. St ee eel br is is tl tle s of w ir ir e br us ushes sh al al l have s uf uff ic ici en ent ri gi gid it ity to c le le an an t he he su rf rf ac ace, a nd nd s ha hal l b e kep t f re re e o f excess f ore ig n m a tt er er, a nd be dis c ar ded w hen no lo ng nger e ff ff ec ect iv iv e. e. H an and sc ra raper s s ha hal l b e kep t s ha har p enou nough to be effe effect ctiv ive. e. Abr as as iv ive c lo lot h o r p ap aper s ho houl d b e o f a g ra ra de de sui ta ta bl ble for t he he i nt nt ended cle a ni ng. To o fi ne ne may gi ve li tt ttl e cl eani ng a nd t oo c oar se m ay c ause s crat ches, espe specia cially lly on non-f on-feerrous rrous meta metall if used used dry dry. ‘W ‘Wet et and and dry’ paper , used wet wi th th w at er , w il il l i nc ncrea se t he he spee peed and and clea leanin ning eff efficien iciency cy– –the the surf urface ace shou hould be dri ed ed w it ith cl ea ean c lo loth s a nd nd not l ef eft to dr y. y. . d e t i b i h o r p k r o w t e n n o e s u r o n o i t u b i r t s i d , e g a r o t S . y l n o e c n e c i l r e s u e l g n i S . 2 0 0 2 n a J 3 2 n o H C I N A P A R A H T N I R A W o t d e s n e c i L
2. 2 P R E L IM IM I N AR AR Y C L E AN AN I N G A N D il, grea grease se and and oth other simi similar lar fore oreign ign DESCALING. Oil, mat te te r, r, and sol ub uble fl ux uxes and fum e depos it it s f ro rom ar ea eas a dj dj ac acen t t o r ec ecen t w el el d ru ns ns, s ha hal l be re mo moved by solv olvent ent clean cleanin ing g (see (see AS 162 1627.1) 7.1) or by fres fresh h wate waterr wash washing ing,, as appr approp opriat riate. e. Heav eavy rust rust scal scalee, when when prese resen nt, shal shalll be loose loosen ned by hand ha mmeri ng, c hip pi ng or s cr a pi ng or by a combi ombina nati tion on of these these.. Chippin hipping g and and scrap scrapin ing g are are usua usually lly carrie carried d out out prior prior to an y wi r e b ru rush in in g o f s te te el el surf ac aces . C hi hi pp ppi ng ng i s not re co comm en ended f or or s of of t m et et al al sur fa fa ce ces . If sc ra ra pi pin g is use d g ou ougi ng ng o f t he he s ur urf ac ace me ta tal s ha hal l be avoi de ded. Loose millsc millscal ale, e, 2.3 2.3 HAND HAND TOOL TOOL CLEANIN CLEANING. G. Loos and l oose or non- adher ent ru st ( on s t eel) and corr orrosi osion prod roducts on ligh lightt metals etals sha shall be remov removed ed by hand and wire wire bru brushin shing g, han hand san sanding ding,, hand and scra crapin ping or b y a c om omb in in at ati on on o f t he hese m et et ho hods , to p ro rodu ce ce th e requ require ired d stan standa dard rd of surf surface ace prepar reparati ation on desc describ ribed ed in Ta bl ble s 2 .1 .1 and 2 .2 .2. On previo previousl usly y painte painted d surfac surfaces es,, loose loose or nonnon-adh adhere erent nt pai nt nt shal l be r em emoved by scr ap apin g. g. T hi hic k e dg dges of re m ai nin g old pai nt s hall be fe ath e red by hand sandi ng s o t hat t he he repai nte d s ur f ace w il l have a smoo mooth app appeara earan nce. ce. The remai remain ning ing old old pain aint sha shall be ex am ami ne ned fo r adh es es io ion b y pr ob obi ng ng w it ith t he he b la la de de of a put ty ty k ni nif e. e.
Th e acce ss ib l e port i ons of part i al l y enclo sed st r uc uct ur ur al al mem be ber s sha ll ll b e cl ea eane d. d. O n new wo rk rk, area reas whic hich are ina inacce ccessib ssiblle afte afterr asse ssembl mbly shal shalll be clea cleane ned d and coate oated d befo before re asse assemb mbly. ly. Spec Special ial atten attentio tion n shall hall be given given to rive rivett head heads, s, crack cracks, s, crev crevice ices, s, lap lap joints joints,, fillet fillet welds elds and and re-e re-entr ntran antt angl angles es usin sing a comb ombina ination tion of tools tools as req required ired.. Hand to ol s shoul d be used in s uch a w ay t hat no bur rs rs or sharp edges ar e le ft ft on t he he sur fa fa ce, a nd no sharp cuts are m ade i n t he m e ta l sur f ace. I f such defe defects cts occu occur, r, they they shall hall be remov removeed by hand hand sandi sanding. ng. On steel teel surfa urface ces, s, tung ungsten sten carb carbiidede-tipp tippeed scra scrap pers ers may b e u se sed. 2.4 2.4 FINAL FINAL CLEAN CLEANING ING.. A ll re sid ual dus t and lo ose m at e ri al al s hall be r em emoved f ro rom t he he sur f ac ace , usi ng ng v ac acuu m, m, dr y co mp mpr es ess eed d a ir ir o r a c le le an an b ru rus h. h. Al l oil , gr ease, et c, le ft on t he su rf ace s hal l be re mo moved by s wa wabbin g wi th th an appropr ia iat e sol ve vent (see see AS 1627.1 27.1)) or othe ther appr ppropr opriate iate clea cleani nin ng age agent. nt. Any re si si du dues s uc uch a s s aallt s o r a ci ci ds ds l ef ef t on t he he su rf rfa ce ce sh al all be t ho hor ou oughl y wa sh shed o ff ff wi t h f re res h wa te te r a nd nd the surfa urfacce shal shalll be dried ried imme immed diate iatelly. 2 .5 .5 A PP PP L LII CA CA TI TI O ON N O F C OA OA TI T I NG NG . Th e app ro ro pr pri at at e p ro rot ec ect iv iv e c oa oati ng ng sha ll ll b e a pp ppl ie ie d n ot ot la t er th a n t he s ame day on w hi ch th e cle ani ng i s und er er ttaaken, and s ha hall b e a pp ppl ie ie d a s so on on a s p os oss ib ib le le af t er er cle a ni ng has t ak aken pl ac ace and befor e vi si bl ble dete deterio riora ratio tion n of the the surfa surface ce has occu occurre rred. d. 2.6 SAFETY SAFETY PRECAUTIO PRECAUTIONS. NS. he cont ra ra ct cto r s ha hall a sc scert ai ain , 2.6. .6.1 Gen Ge nera eral. T he comp comply ly with with and and obse observ rvee all all the statu statutes tes,, regu regulat lation ions, s, and and inst instruc ructio tions ns of the the relev relevan antt statu statutor tory y auth author oriti ities. es. Health haza azards rds assoc ssociiated ated 2.6. 2.6.2 2 Heal Health th hazar hazards. ds. Hea with han hand tool ool clea clean ning ing inclu includ de the follow ollowin ing g: (a ) Pa rt rti cl cle s of met al al wh ic ic h cou ld ld p en enet rraat e t he he e ye ye. (b) Fi re re or expl os osi on on. 2.6.3 2.6.3 Eye protec protection. tion. Sa fe fe ty ty gog gl gl es es sh al all be w or or n by ope ra ra to tor s ( se see A S 1715 and AS 1716). 2.6. 2.6.4 4 Safe Safe working working guide guideline lines. s. Where here chip chippi ping ng hamm ammers ers are are use used near ear flamm flammaable ble mate aterial rial or fum fumes, es, non-sp n-spaarkin rking g tool toolss shou hould be use used.
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AS 1627.7—1988
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TABLE 2.1 GUIDE TO SURFACE PREPARATION OF STEEL ACHIEVABLE WITH HAND TOOLS Or ig ig in in al al s u urr fa fa ccee c on ondi ti ti on on
. d e t i b i h o r p k r o w t e n n o e s u r o n o i t u b i r t s i d , e g a r o t S . y l n o e c n e c i l r e s u e l g n i S . 2 0 0 2 n a J 3 2 n o H C I N A P A R A H T N I R A W o t d e s n e c i L
Ch iip p pi pi ng ng h am am me me r
Scraper
Ha n nd d held wi re re br us ush
Ab ra rasi ve ve c lo lo tth h or paper
A. Un pain te te d. d. In ta ta ct mi ll ll No t ap a ppli cabl e. scale cale over over the the whol wholee su rf rf a ce ce. T yp yp if if i ed ed b y Ru st st Gr ad ade A o f A S 16 27 27 .9 .9 .
No t ap a pp li cabl e.
No t ap a pp li cabl e.
No t ap a ppli cabl e.
B. Un pain te te d. d. Su rf ac ace with some ome rust rust partl partly y fl ak ak ed ed . T yp yp if if ie ie d b y Ru st st Gr ad ade B o f A S 1 62 62 7. 7. 9. 9.
Will Will remove remove loosel loosely y adhe adheren rentt millsc millscale ale only. only. Continuo Continuous us hammering hammering caus causes es scarrin carring g of the meta metall and and prov provid ides es fissures fissures for second secondary ary corrosion.
Will Will remove remove loosel loosely y adhe adheren rentt millsc millscale ale only. only.
Will Will remove remove loosel loosely y adhe adheren rentt millsc millscale ale and and powd powder ery y rust rust only only..
Very Very coar coarse se abras abrasive ive clot cloth h will will remo remove ve only only loosely loosely adherent adherent millsc millscale ale and and powd powdery ery rust.
C. Un pain te te d. d. Su rf ac ace is cons conside iderab rably ly rusted rusted and and li gh gh tl tl y p it itt ed ed . No in ta ta ct ct millsc millscale ale remains remains.. Typifie Typified d by Ru st st Gr ad ad e C of AS 1627. 1627.9. 9.
Will Will remo remove ve rust rust only only No t a pp li cabl e. parti partial ally. ly. Rust Rust retai retaine ned d in pits pits.. Cont Contin inuo uous us hammering hammering cause causess sc ar ar ri ri n g of t he he me ta ta l and and provid provides es fissur fissures es for seco second ndar ary y corros corrosion ion..
Wi ll re mo ve r ust o nl y parti partial ally. ly. Rus Rust retai retaine ned d in pits pits..
Will Will remo remove ve rust rust only only parti partial ally. ly. Rust Rust retai retaine ned d in pit pits.
D. Un pain te te d. d. Su rf ac ace is heav heavily ily ruste rusted d and and pitte pitted. d. Varyi arying ng amoun mounts ts of rust rust scal e m ay ay be p re re se sent . No intact intact millsca millscale le remains remains..
Will Will break break adhe adhesi sion on of rust rust flake flakess and and heav heavy y rust.
Will Will remove remove loosen loosened ed rust rust only only..
Will Will only only remo remove ve loose loosely ly adhe adheren rentt and and powde powdery ry rust.
Will Will remove remove loosel loosely y adhe adheren rentt and and powde powdery ry rust rust only only..
E. Pr ev evio us usly p ai ai nt nt eed d. Li tt tt le le o r no r us ust e vi vi de de nt nt . Paint aint coat coating ing with with only only minor defects defects..
No t a ppli cabl e.
Wi ll re mo ve a ny loosely loosely adherent adherent coatings.
Will Will remo remove ve any any loose loosely ly adheren adherentt coatings coatings..
Suitable.
F. Pr ev evio us usly p ai ai nt nt eed d. Varyi arying ng amoun mounts ts of visi visibl blee ru st st . P ai ai nt nt co at at in in g w it it h blister blistering, ing, flaking flaking or other other defects.
On ly ly p ai ai nt nt a nd nd so me me loose loosely ly adheri adhering ng rust rust remove removed. d. Continu Continuou ouss hamme hammering ring will caus causee scarring.
Will Will remove remove loosel loosely y adhe adhere rent nt pain paintt and and rust rust only.
Will Will remove remove loosel loosely y adher dheren entt pain paintt and and rust rust only.
Vigo Vigorou rouss rubbi rubbing ng is requ require ired d to remov removee rust rust and and defec defectiv tivee paint paint..
TABLE 2.2 GUIDE TO SURFACE PREPARATION OF LIGHT METALS ACHIEVABLE WITH HAND TOOLS Suitability Hand tool
Original surface condition Co nd it io n A *
Remarks
Co nd it io n B †
Sc ra per
Wi ll re mo ve a ny l oosely adheren adherentt coatings coatings..
Will Will remo remove ve any any loose loosely ly adhe adhere rent nt pain paintt and and rust rust only only..
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Wi re br bru sh
Wi ll re re mo ve an any lo loosely adheren adherentt coatings coatings..
Will Will remove remove loosel loosely y adhere adherent nt pa in in t a nd nd r us ust o nl nl y. y.
St ee ee l w ir ir e b ru rus he he s a re re no t recom recommen mende ded d beca becaus usee their their use use may may res result ult in stee steell part particle icless rema remain inin ing g on the the surfa surface ce whic which h may may initiat initiatee bimeta bimetallic llic corro corrosi sion on.. If used used,, parti particl cles es must must be remo remove ved d on comp complletion etion or wire wire brus brushi hing ng..
Ab ra si ve cl c lo th or o r pa p aper
Su it able
Co ar se g ra de ab a bra si ve cl c l ot h wi wi ll remo remove ve old old pain paintt and and corro corrosi sion on prod produc ucts ts from from the the plan planee surf surfac ace. e. Will Will not not remov removee corro corrosi sion on from from pits.
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* Previo revious usly ly pain painte ted; d; little little or no corro corrosi sion on evid eviden ent; t; pain paintt coat coatin ing g havi having ng only only minor minor defe defect cts. s. † Pr ev ev io io us usly pa in in te te d; d; v ar ar yi yi ng ng a mo mo un un ts ts o f v is isi bl bl e co rr rr o si sio n p re resen t; t; p ai ai nt nt co at at in in g h av av in in g bl is is te te ri ri n g, g, fl a ki kin g o r ot he he r d ef ef ec ec ts ts ; in m an an y ca se ses a c om om bi bi na na ti ti o n of al l t hr hr ee ee t oo oo ls ls m ay ay b e re qu qu ir ir ed ed .
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7
AS 1627.7—1988
APPENDI PPENDIX XA
PURCHASIN PURCHASING G GUIDELINES GUIDELINES (T hi his Ap pe pen di di x d oe oes n ot ot f or orm an i nt nte gr gr al al p ar art of th is is S ttaa nd ndard ) Australian ian Standa Standards rds are intend intended ed to includ includee the techn technica icall provi provision sionss A1 GENERAL. Austral nec es es sa sar y fo r t he he su pp ppl y of p ro ro du ducts r ef ef er err ed ed to i n th e p ar art ic ic ul ula r St an anda rd rd , but do not purp purpor ortt to comp compris risee all the the nece necessa ssary ry prov provis ision ionss of a cont contra ract. ct. This This Appe Append ndix ix cont contai ains ns advi advice, ce, and and reco recomm mmen enda datio tions ns on the info inform rmat ation ion to be suppli upplied ed by the purch purchas aser er at the the ti me me o f i nq nquir y or o rd rd er er . It s a i ms ms are t o avoi d mi su sunder st an andi ng ng, a nd t o r es esul t i n th e pur ch cha ser r ec ece iv ing sati satisfa sfact ctory ory prod produc ucts ts and and serv service ice.. purchase aserr A2 INFORMATION INFORMATION TO BE SUPPLIED BY THE PURCHASER. PURCHASER. The purch sho ul ul d s up upply t he he f ol ol lo lo wi win g i nf nfo rm rm at ati on on a t t he he ti me me o f enq ui ui ry ry o r or de der : (a) The The origin original al surfa surface ce con condit dition. ion. (b ) Met ho hod t o be use d. (c ) Cl as ass of c le le an ani ng ng re qu qui rree d. d. (d ) Tr ea eat me ments r eq equi rree d f or or w el el ds ds and s te te el el defe ct cts . . d e t i b i h o r p k r o w t e n n o e s u r o n o i t u b i r t s i d , e g a r o t S . y l n o e c n e c i l r e s u e l g n i S . 2 0 0 2 n a J 3 2 n o H C I N A P A R A H T N I R A W o t d e s n e c i L
(e) Requ equireme irement ntss for for pre prelimin liminar ary y clea cleani nin ng. (f) Maximu ximum m dela elay allow lloweed befo efore coa coating ting app applicatio ication n. (g ) Nat ur ure of t he he c oa oati ng ng. (h) Qual uality con control trol and insp inspeection ction req requir uiremen ementts. (j )
Sp ec eci al al r eq equir em eme nt nts f or or p ar art ic ic ul ula r s it it e a nd nd we at ath er er .
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