1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 04 2018 07 06 Revised Revised humidity resistance C. Moghadam, NA 2018 01 24 Editorial See Summary of Revisions C. Moghadam, NA 2016 08 23 Released C. Taylor, NA / Global Team Controlled document at www.MATS Copyright 2018 Ford Global Te
2、chnologies, LLC Page 1 of 12 PAINT PERFORMANCE: ALUMINUM WHEELS, ROAD AND SPARE WSS-M2P122-E1 PAINT PERFORMANCE: ALUMINUM WHEELS, INTERIOR STOWED MINI SPARE WSS-M2P122-E2 PAINT PERFORMANCE: STEEL WHEELS, ROAD AND SPARE WSS-M2P122-E3 PAINT PERFORMANCE: STEEL WHEELS, INTERIOR STOWED MINI SPARE WSS-M2P
3、122-E4 1. SCOPE These specifications define the performance requirements for colored/clear coatings over wheels. 2. APPLICATION These specifications were released originally for full or partially painted wheels. 3. REQUIREMENTS For MCDCC testing, the use of test panels is preferred. However, wheels
4、may be used with agreement from both Materials Engineering and Core Engineering. To prevent delays, its recommended that permission be obtained early in the process before starting testing. The type of sample used should be noted on the MCDCC. For DVP testing, all requirements of this specification
5、must be met with production intent wheels unless otherwise noted in Table 1. 3.1 APPROVED SOURCES This specification is performance based and does not have approved sources. 3.2 COATING The supplied coating shall be a continuous film, free of blisters, bubbles, foreign material and similar imperfect
6、ions. 3.2.1 Aging Prior to testing, test specimens prepared for investigations according to this specification must be aged at least 72 hours at 23 +/- 2 C (preferred) or 16 hours at 45 +/- 1 C. 3.2.2 Cure Profile A part time/temperature curve from the production process for the part is required for
7、 each oven. Paint supplier bake windows for each material/oven shall be submitted with the curve in order to verify cure conditions. ENGINEERING MATERIAL SPECIFICATION WSS-M2P122-E1/E2/E3/E4 Copyright 2018, Ford Global Technologies, LLC Page 2 of 12 3.3 FILM PROPERTIES 3.3.1 Film Thickness (FLTM BI
8、117-01, ASTM B487) The applied coating thicknesses must be sufficient to meet all the requirements of this specification, the Wheel DVP testing (Design Verification Plan), and the appearance requirements developed at AAR (Appearance Approval Report). The table below provides typical F point film thi
9、ckness ranges in micrometers. These film thicknesses are not requirements. Recommended film thicknesses for premium colors will be noted on the MCDCC. Standard Paint (Full Hiding Basecoat) Premium Paint (Partial Hiding Basecoat) Machined or Polished with Clearcoat E-Coat with Monocoat E-Coat - - - 1
10、7-24 Primer (Powder) 50-150 50-150 - - Basecoat Liquid Liquid - - 15-30 3-8 - - Clearcoat Powder Liquid Powder Liquid Powder Liquid - 50-150 38-50 50-150 38-50 70-150 38-50 - Monocoat (Liquid) - - - 38-50 C points (corner points) must meet the acceptance criteria defined in the Global Wheel FS (Func
11、tional Specification). DV (Design Verification) testing film thicknesses should be listed on the drawing. To promote robust paint adhesion, a zinc phosphate pretreatment per WSS-M3P36-A1 is recommended prior to electrocoating steel wheels, while a suitable pretreatment passivation shall be used prio
12、r to painting aluminum wheels. 3.3.2 Initial Hardness Hardness values at the target film and bake conditions shall meet the recommendations of the paint supplier and be recorded and available upon request. Paint shall be sufficiently cured at time of packing to withstand normal handling without dama
13、ge. Properly cured paint finish shall be hard enough to dry sand easily with 360 grit paper without gumminess or severe scratching. 3.3.3 Color (Except -E2 & -E4) (FLTM BI 109-01 Visual Assessment, SAE J1545, Three-Angle CMC) Shall match the Master Approved Sample color panel or the initial sample a
14、s approved by Design Center. ENGINEERING MATERIAL SPECIFICATION WSS-M2P122-E1/E2/E3/E4 Copyright 2018, Ford Global Technologies, LLC Page 3 of 12 3.3.4 Gloss Report (Except -E2 & -E4) (FLTM BI 110-01, ASTM D 523) Shall match the Master Approved Sample color panel or the initial sample as approved by
15、 Design Center. Gloss A: 20 Glossmeter min 92 B: 60 Glossmeter 76 - 84 C: 60 Glossmeter 66 - 74 D: 60 Glossmeter 58 - 66 E: 60 Glossmeter 47 - 53 F: 60 Glossmeter 32 - 38 G: 60 Glossmeter 17 - 23 H: 60 Glossmeter 7 - 13 J: 60 Glossmeter 4 6 Q: 60 Glossmeter 3.8 4.2 K: 60 Glossmeter 2 4 N: 60 Glossme
16、ter 1.8 2.4 P: 60 Glossmeter 1.6 2.0 R: 60 Glossmeter 1.2 2.0 L: 60 Glossmeter 0.5 - 2.0 3.3.5 Gas Soak (Except -E2 & -E4) (Immerse samples for 1 h at 23 +/- 2 C in commercially available grade of lead free gasoline.) After 5 minute recovery time, no color change in excess of Gray Scale rating 4-5 (
17、AATCC Evaluation Procedure 1/ISO 105-A02), no gloss change (FLTM BI 110-01, 25% max for A & B gloss surfaces), and no surface distortion or permanent softening permitted. Adhesion shall meet the requirements of paragraph 3.4. 3.3.6 Ultraviolet Light Transmission (Except -E2 & -E4) For each color, me
18、asure the light transmission of the basecoat and clearcoat layering system at the minimum recommended film builds using an integrating sphere spectrophotometer. Report transmission at 360 nm and 400 nm. Submit transmission curve and table of values over entire range measured. Samples should be free
19、films or films on quartz slides. Glass slides are not allowed. 3.4 PAINT ADHESION Grade 2 max (FLTM BI 106-01, Method B, carbide tip scribe only, If wheel geometry does not allow Method B, contact Materials Engineering or Core Wheels Engineering for approval of alternate methods) Lightly hand sand p
20、aint film surface (10 double rubs, moderate pressure) with P600 paper until dull, before scribe operation and checking adhesion. Clean film surface with 50/50 mixture IPA/water before testing. Rating should include loss of adhesion to substrate and loss of adhesion between paint layers. If there is
21、adhesion loss beyond Grade 2, document which layers the loss is between. ENGINEERING MATERIAL SPECIFICATION WSS-M2P122-E1/E2/E3/E4 Copyright 2018, Ford Global Technologies, LLC Page 4 of 12 3.5 HIGH PERFORMANCE ADHESION (Except -E2 & -E4) 3.5.1 Thermal Shock Rating 20 (FLTM BI 107-05) If testing mul
22、tiple locations on one wheel section, the section must be cut into 3 individual pieces before performing the thermal shock test. Rating should include loss of adhesion to substrate and loss of adhesion between paint layers. If there is adhesion loss beyond Grade 2, document which layers the loss is
23、between. Alternate Method 3.5.2 Resistance Against High Pressure Cleaner 2 mm2 max (FLTM BO 160-04, Method B) Prior to testing the painted surface shall be X-scribed through to the substrate (30 angle). Rating should include loss of adhesion to substrate and loss of adhesion between paint layers. 3.
24、6 HEAT RESISTANCE Rating 4-5 min (7 days at 80 +/-2 C, AATCC Evaluation A & B Gloss Surfaces: Procedure 1/ISO 105-A02) 3mm dia.) Alternate Method 3.10.2 Grit Blast, Split Shot Rating 7 min (FLTM BI 157-06) Test shall be conducted on flat test pieces cut from production wheels. Ratings shall be based
25、 on chips to substrate. A chip shall be rated by measuring its longest dimension. Chips on edges may be disregarded if the film thicknesses are within the ranges listed in paragraph 3.3.1. or each paint suppliers recommended film thickness range. 3.11 WATER RESISTANCE (FLTM BI 104-01, Method C, 240
26、h, seal cut edges if needed) No blistering, dulling, softening, adhesion loss, and/or any other film failure. After exposure, adhesion shall be tested within 30 minutes after removal from water according to paragraph 3.4. 3.12 HUMIDITY RESISTANCE Rating 4-5 min (AATCC Evaluation Procedure 1/ISO 105-
27、A02) 240 h at 41 5 C and 95 5% R.H. After exposure, adhesion shall be tested and met per paragraph 3.4 within 60 minutes after exposure. No blistering, dulling, softening, and/or any other film failure. ENGINEERING MATERIAL SPECIFICATION WSS-M2P122-E1/E2/E3/E4 Copyright 2018, Ford Global Technologie
28、s, LLC Page 6 of 12 3.13 RESISTANCE TO EXTERIOR WEATHERING (Except -E2 & -E4) 3.13.1 Weathering Requirements Accelerated Weathering Outdoor Weathering ASTM D7869 (Preferred) SAE J2527 Boro/Boro SAE J1976 New Application of Existing Paint Technology 2250 hours 3000 hours Not required New Paint Techno
29、logy (contact Materials & Core Engineering to make determination) 3750 hours 6000 hours 1, 3, 5 yr 3.13.1.1 Appearance There shall be no blistering, cracking, peeling, micro cracking/checking, or other film failure after any of the exposure levels listed in paragraph 3.13.1 After 1 year Florida expo
30、sure there shall be no visual color change and 10% maximum gloss loss. After 3 years Florida exposure or 3000 h accelerated weathering per SAE J2527 Boro/Boro or 2250 h accelerated weathering per ASTM D7869: AATCC Evaluation procedure 1: Rating 4 min Gloss Change per ASTM D 523 25% loss max A & B gl
31、oss only Adhesion, X-scribe per FLTM BI 104-01 10% loss After 5 years Florida exposure or 6000 h accelerated weathering per SAE J2527 Boro/Boro or 3750 h accelerated weathering per ASTM D7869: Adhesion, X-scribe per FLTM BI 104-01 10% loss 3.13.1.2 Adhesion After Water Immersion 90% adhesion (FLTM B
32、I 104-01, 24 h immersion) retention No peeling, delamination, blistering, cracking, or crazing. Samples required are as follows: 1 un-tested control Each exposure level: o 1 sample for color, gloss, and adhesion o 1 sample for adhesion after water immersion For example, if testing to ASTM D7869 3750
33、 h, the following samples would be required: 1 un-tested control 1 2250 h color, gloss, and adhesion 1 2250 h adhesion after water immersion 1 3750 h color, gloss, and adhesion 1 3750 h adhesion after water immersion 5 total samples ENGINEERING MATERIAL SPECIFICATION WSS-M2P122-E1/E2/E3/E4 Copyright
34、 2018, Ford Global Technologies, LLC Page 7 of 12 For DV/PV testing using a part, the test piece should be a relatively flat, class A surface cut from the wheel spoke, including both machined/polished and painted surfaces if applicable. Insure the spoke face is the correct distance from the light so
35、urce as specified in the test method. Any deviations from the method must be approved by Materials Engineering in advance and noted in the test report. For MCDCC testing, weathering should be performed at the minimums in paragraph 3.3.1 or the minimum paint supplier recommended film thickness. If us
36、ing supplier recommendations, supplier should provide recommended film thickness ranges for each product in the test report. 3.14 FILIFORM RESISTANCE, (Except -E2 & -E4) Applies to Bright Machined and Polished, Clear Coated Surfaces Only (SAE J2635, 672h) Wheel samples shall consist of a pie-wedge p
37、iece containing two spokes, two lug towers, pilot bore, valve hole, and two scribe lines (see below). No more than 4.0 mm corrosion or loss of adhesion from the scribe line. No filament growth allowed from design edges. Design edges include, but are not limited to, deflash edges, pilot bore, valve h
38、ole, and lug towers. Scribing is not required if machined surface along spoke (perpendicular to machining direction) is less than 10 mm. ENGINEERING MATERIAL SPECIFICATION WSS-M2P122-E1/E2/E3/E4 Copyright 2018, Ford Global Technologies, LLC Page 8 of 12 3.15 CYCLIC CORROSION RESISTANCE (Laboratory A
39、ccelerated Cyclic Corrosion Test 00.00-L-467) 3.15.1 Aluminum Wheels WSS-M2P122-E1 9 weeks WSS-M2P122-E2 4 weeks At test termination, wheel must have an acceptable as-installed appearance based on a jury evaluation of at least two people, one person from Ford Wheels Engineering, and the other from e
40、ither Ford Wheels or Materials Engineering. Additionally, the wheel appearance must meet the minimum appearance requirements as defined in the corrosion evaluation photo guides located in the Global Engineering Standard, RQT-001101-002492, Reference 1. 3.15.2 Steel Wheels 1% Rust (ASTM D610) (Rust G
41、rade 6) WSS-M2P122-E3 9 weeks WSS-M2P122-E4 4 weeks 3.16 IN-PROCESS RE-WORK Alloy wheels can be processed through coating operations a maximum of 2 times (initial and one re-work). Subsequent rework after 2 coatings requires that the wheels be stripped prior to reprocessing. Re-worked wheels must ma
42、tch the master samples originally approved by the Design Center, and meet all of the performance requirements of this specification, and requirements of the cast aluminum material specification, WSS-M2A123-B1/B2. 4. GENERAL INFORMATION This information given below is provided for clarification and a
43、ssistance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 4.1 STRIPPING Wheel stripping processes must not degrade the mechanical properties of the wheel. Recommended processes for alloy wheels are listed below: Atotech USA In
44、c. - Recover 5000 Process 1750 Overview Dr., Rock Hill, SC 29730 803-326-3439 or Henkel Corporation P3 Stripper 3000 32100 Stephenson Highway, Madison Heights, MI 48071 (248) 583-9300 or 4.2 RECOMMENDED TESTING FOR DESIGN AND PRODUCTION VALIDATION, SREA, AND MCDCC. Paint performance is a function
45、of material selection, surface preparation, and paint application. For established coatings and coating lines, this may permit a reduced test schedule to validate compliance to this specification. Use table 1 to determine the recommended test plan depending on the situation. ENGINEERING MATERIAL SPE
46、CIFICATION WSS-M2P122-E1/E2/E3/E4 Copyright 2018, Ford Global Technologies, LLC Page 9 of 12 4.3 APPROVAL OF MATERIALS Suppliers desiring approval of their materials shall first obtain an expression of interest from Purchasing, Design or Product Development, and Materials Engineering. The supplier s
47、hall submit a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrating full compliance with all the requirements of the Material Specification. Tested material samples must be available for review upon request and kept f
48、or a minimum of one year. Upon request, the supplier will review the associated quality control documents (Process Failure Mode and Effects Analysis, Control Plans, Certification testing) with Ford. 4.4 SUPPLIERS ONGOING RESPONSIBILITY All materials must be equivalent in all characteristics to the m
49、aterial upon which approval was originally granted. Prior to making any changes to the material originally approved, whether or not such changes affect the materials ability to meet the specification requirements, the supplier shall notify the affected Supplier Technical Assistance (STA), Purchasing, and Materials Engineering activities of the proposed changes (with reasons) by submission of a completed Suppliers Request for Engineering Approva
