Wss-m2p177 - Paint Performance, Chassis Low Level Visible - A1 a a5

ENGINEERING MATERIAL SPECIFICATION

PAINT PERFORMANCE, CHASSIS LOW LEVEL VISIBLE, 96 h SALT SPRAY RESISTANCE

WSS-M2P177-A1 WSS-M2P177 -A1

PAINT PERFORMANCE, CHASSIS LOW LEVEL VISIBLE, 240 h SALT SPRAY RESISTANCE

WSS-M2P177-A2 WSS-M2P177 -A2

PAINT PERFORMANCE, CHASSIS LOW LEVEL VISIBLE, 360 h SALT SPRAY RESISTANCE

WSS-M2P177-A3 WSS-M2P177 -A3

PAINT PERFORMANCE, CHASSIS LOW LEVEL VISIBLE, 480 h SALT SPRAY RESISTANCE

WSS-M2P177-A4 WSS-M2P177 -A4

PAINT PERFORMANCE, CHASSIS LOW LEVEL VISIBLE, GREATER THAN 480 h SALT SPRAY/WATER RESISTANCE PER DRAWING

WSS-M2P177-A5 WSS-M2P177 -A5

NOT TO BE USED FOR NEW DESIGN 1.

SCOPE

These specifications define the performance requirements for a protective finish for chassis and underhood components applied prior to shipment to the assembly plant. 2.

APPLICATION

These specifications were released originally to be specified on chassis components that are not generally top coated and which receive a minimal amount of direct ultraviolet exposure. In applications where prolonged exposure to UV light is expected, epoxy resins resins should not be used. The paint system described shall provide uniform coverage, adequate appearance and moderate to severe corrosion protection performance. These specifications are not intended to limit the coating to any specific material or process, but instead define the performance of the system. Unless otherwise noted, all requirements of these specifications must be met with actual production intent components. 3.

REQUIREMENTS

Material specification requirements are to be used for initial qualification of materials. 3.0

STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS

Material suppliers and part producers must conform to the Company's Standard Requirements For Production Materials (WSS-M99P1111-A (WSS-M99P1111-A). ).

Date

Action

Revisions

2006 09 29

N-STATUS

Replaced by WSS-M2P177-B WSS-M2P177-B1/B2 1/B2

2003 08 12

Revised

Para 3.0 inserted; Para 3.1, 3.2, 3.7, 3.8, 4 deleted

1996 04 19

Activated

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L. Schmalz

T. Horoszy Copyright © 2006, Ford Global Technologies, LLC

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ENGINEERING MATERIAL SPECIFICATION WSS-M2P177-A1/A5 3.3

SYSTEM COMPONENTS

3.3.1

Substrate  As specified on the Engineering Drawing. Whenever a test panel is used to satisfy a requirement in these specifications, the test panel must have the same substrate i.e. cold rolled/hot rolled steel, cast iron, wrought/cast aluminum and be painted on the same system as the production intent component.

3.3.2

Metal Preparation The surface to be coated must be free from oil, alkaline residues, rust, dirt, moisture and other foreign materials.  A preliminary shot blasting or pickling operation is required on castings, forgings, and scaled steel. Electrocoated or powder coated components must be zinc phosphated per  WSK-M3P1-C. The use of iron phosphate is not permitted for electrocoat or powder  coat paint processes.

3.4

FILM PROPERTIES

3.4.1

Color  (FLTM BI 109-01) Black or as specified on the engineering drawing. Test shall be conducted on flat test pieces cut from production intent component, or  on panels prepared in accordance with para 3.3.1.

3.4.2

Initial Hardness The finish shall be sufficiently cured at the time of packing to withstand normal handling and shipping without damage.

3.4.3

Paint Adhesion (FLTM BI 106-01, Method B)

3.4.4

Film thickness, min

Grade 0 No chipping

Film thickness must be sufficient to meet all the performance requirements of these specifications. See para 5.1 for target film thickness values. 3.5

RESISTANCE PROPERTIES

3.5.1

Chip Resistance, max (SAE J400)

4B

Test shall be conducted on flat test pieces cut from production intent component, or  on panels prepared in accordance with para 3.3.1. or (FLTM BI 157-04)

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3 - 4 min

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ENGINEERING MATERIAL SPECIFICATION WSS-M2P177-A1/A5

3.5.2

Salt Spray Resistance, min (FLTM BI 103-01, Scribed) WSS-M2P177-A1 WSS-M2P177-A2 WSS-M2P177-A3 WSS-M2P177-A4 WSS-M2P177-A5

Greater than 480 h

96 h 240 h 360 h 480 h Per Engineering Drawing

Requirement A - No blistering, chipping, peeling, rust creepage o r adhesion loss more than 3 mm from scribe. Test shall be conducted on flat test pieces cut from production intent component, or  on panels prepared in accordance with para 3.3.1. Requirement B - Part after salt spray must be rated no worse than Grade 6 as defined by ASTM D 610 (exclude scribed area). Test shall be performed on components or paras as large as can be handled by testing equipment 3.5.3

Water Resistance, min (FLTM BI 104-01)   Allow paint film to recover 1 h at room temperature after water immersion before evaluating film properties. WSS-M2P177-A1 WSS-M2P177-A2 WSS-M2P177-A3 WSS-M2P177-A4 WSS-M2P177-A5

Greater than 480 h

96 h 240 h 360 h 480 h Per Engineering Drawing

No softening, rust, dulling, color change and/or loss of adhesion. Blistering no greater than Few, size 8 (ASTM D 714) is permitted.  Adhesion shall be tested according to para 3.4.4 Test shall be performed on components or sections as large as can be handled by testing equipment 3.5.4

Gasoline Resistance The finish shall not blister or show more than slight softening or dulling when subjected to immersion for 1 h at 23 +/- 2 °C in commercially available grade of 87 octane lead free gasoline, ethanol blend (Gasohol) or methanol/ gasoline blends. Test shall be conducted on flat test pieces cut from production intent component, or  on panels prepared in accordance with para 3.3.1.

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ENGINEERING MATERIAL SPECIFICATION WSS-M2P177-A1/A5

3.5.5

Ethylene Glycol Resistance The finish shall not blister or show more than slight softening or dulling when subjected to immersion for 1 h at 70 +/- 2 °C in a solution of 50% water and 50% factory-fill coolant. Test report must state coolant used. Test shall be conducted on flat test pieces cut from production intent component, or  on panels prepared in accordance with para 3.3.1.

3.5.6

Hot Oil Resistance The finish shall not blister, lift or show more than a slight softening or dulling after  immersion for 1 h at 65 +/- 2 °C in currently used factory-fill crankcase oil (diesel or  gasoline powered). Test shall be conducted on flat test pieces cut from production intent component, or  on panels prepared in accordance with para 3.3.1.

3.5.7

Heat Aging/Resistance (Only Applicable When Specified on the Engineering Drawing) (24 h at 175 +/- 3 °C followed by quench in room temperature water) 3.5.7.1

Adhesion (see para 3.4.4)

3.5.7.2

Salt Spray (see para 3.5.2 - Requirement B) Finish after heat & quench must meet adhesion and salt spray requirements. Test shall be conducted on flat test pieces cut from production intent component, or on panels prepared in accordance with para 3.3.1.

3.5.8

Proving Ground Resistance CETP 00.00-R-311 (P3-76-A) Component shall comply with the WPAS Corporate Corrosion Guidelines of the WCR for appearance, serviceability (if applicable) and function. See appropriate materials engineer for specific requirements on each component.

3.6

SPECIAL REQUIREMENTS

3.6.1

Hydrogen Embrittlement Components finished to these specifications must meet the requirements of  WSS-M99A3-A.

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ENGINEERING MATERIAL SPECIFICATION WSS-M2P177-A1/A5 5.

GENERAL INFORMATION

The information given below is provided for clarification and assistance in meeting the requirements of  these specifications. 5.1

5.2

FILM THICKNESS MINIMUM TARGET VALUES (FLTM BI 117-01)

Electrocoat

18 Pm

Powder Coat

45 Pm

Spray or Dip Coatings

25 Pm

Plating

6 Pm

GLOSS (FLTM BI 110-01)

The recommended gloss level for chassis components visible with "wheels on ground" is 30 to 80 at 60° angle. Test shall be conducted on flat pieces cut from production intent component, or on panels prepared in accordance with Section 3.3.1. 5.3

PANEL INFORMATION

Test panels are available from Advanced Coating Technologies Inc. (ACT).  ACT P. O. Box 735 Hillsdale, MI 49242

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