1、 ENGINEERING MATERIAL SPECIFICATION PAINT PERFORMANCE, FLEXIBLE SUBSTRATES, EXTERIOR WSS-M2P181-C 1. SCOPE This specification defines the performance requirement of a painted part for all exterior body parts where best appearance, high flexibility, high durability, and impact resistance are required
2、. This system is specified for component suppliers, covering all processes including in-department and pre-delivery repairs. 2. APPLICATION This specification was released to define paint performance of exterior painted surfaces. It is specified for vehicle bumpers, claddings, bodyside moldings, and
3、 other parts visible after assembly. 3. REQUIREMENTS All visible parts of the component, including terminating exterior edges visible after assembly shall conform to the full requirements of this specification. Any localized post mold operations (Flame Treating, Sanding,) prior to painting requires
4、the additional testing as noted in the last column of Table 1. All areas of the component visible after assembly must be evaluated/tested, including flanges, parting lines, areas subject to post-mould treatment, styling lines and grooves. In-department, pre-delivery and refinish paint repairs shall
5、meet the requirements of this specification. Parts must conform to the color requirements defined by the Ford Color Harmony Team or equivalent. Body color components shall visually match the adjacent body region for orange-peel and waviness. Instrumental measurements such as Wavescan or QMS may be u
6、sed as a guide if measurement is feasible. Refer to the appearance requirements of the adjacent body region. Note: For in process color check the preferred method is SAE J1545, three angle CMC (Color Measurement Committee). 3.1 APPROVED SOURCES This specification is performance based and does not ha
7、ve approved sources. Paint materials must be selected from the Painted Parts Strategy List using paints from suppliers on the Ford Approved Source List (ASL), unless a waiver is granted by Materials Engineering. All parts must also meet the appropriate DVP&R and Subsystem Design Specification requir
8、ements Effective 2007 model year and beyond, all paint applicators must meet the Exterior Parts Painter Approval Process (AVP-T113-015) unless waived by Materials Engineering.Date Action Revisions Rev. 02 2016 03 08 Revised See Summary of Revisions(5.0) for details J.Crist/Global Paint Team 2014 03
9、03 Revised See Summary of Revisions(5.0) for details J.Crist/Global Paint Team 2007 10 29 Activated J. Crist Controlled document at www.MATS Copyright 2014, Ford Global Technologies, LLC Page 1 of 11 ENGINEERING MATERIAL SPECIFICATION WSS-M2P181-C 3.2 SYSTEM COMPONENTS 3.2.1 Substrates Flexible poly
10、mers and flexible polymer blends, PU, PP, TEO etc. (ASTM D790, Method 1) 3.2.2 Substrate Condition The surface to be coated must be cleaned by an automated process to ensure the absence of oil or alkaline residues, fingerprints, corrosion, mold release agents, dirt, moisture, and other foreign mater
11、ials. Surface energy/resistivity or chemical reaction(s) enhancements (flaming, corona discharge or plasma) and/or addition of conductive materials, necessary to meet the requirements of this specification, shall be specified on the PFMEA, Engineering Drawing and Control Plan. 3.2.3 Paint System Req
12、uirements Substrate * Pre-treat Prime (Note 1) Topcoat (Note 1)* Thermoplastic Polymers (TPO, TPE) As applicable to meet Process/Performance Specifications Primer, Surfacer As applicable to meet Process/Performance Specifications (6-16 m min Primer /Surfacer) Basecoat/Clearcoat (2-Layer): 15-30 m /3
13、850 m Monocoat: 38-50 m Tricoats (3-layer): 20-30m/15-30m /3850 m * - Ford Materials Engineering approved materials (Approved Source List) Note 1: These ranges are considered to be requirements unless otherwise supported by testing data agreed to by Materials Engineering and noted on the MCDCC. Cont
14、rol Plan must specify if adhesion promoter, and/or anti-chip primer surfacer are required to meet the requirements of this specification. 3.2.4 Repairs, In-Department and Pre-delivery Repaired areas must meet the requirements of this specification. All repair materials and processes used should be a
15、pproved by the affected Product Materials Activity. Maximum film thickness and/or number of repairs for repaired parts will be specified in the mutually agreed control plan and conform to Para 3.3. All repairs must be with the identical color to the original finish unless approved by Materials Engin
16、eering. 2 in Department Repairs = 1strun part + 1 inline repair For 2-Component systems the recoats must be applied within manufacturer recommended timeframe as noted on their Technical Data Sheets. Copyright 2014, Ford Global Technologies, LLC Page 2 of 11 ENGINEERING MATERIAL SPECIFICATION WSS-M2P
17、181-C 3.2.5 Finished Parts Testing must be conducted on actual production parts. Where part dimensions limit equipment access and testing, representative panels run through the production processes may be substituted for production part. If regrind is used, testing at the maximum loading level is re
18、quired and must meet the specification requirement. These panels shall be processed together with parts and shall be representative of the parts with respect to substrate, primer thickness, sanding, paint thickness, and processing. When panels are used as a substitute, this must be clearly reported
19、on the PSW or the laboratory test report. 3.2.6 Aging 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 prior to testing. 3.2.7 Process/Product Validation Test Requirements as listed in Table
20、1. This table is only for Approved Paint Technologies as shown on Ford Approved Source List otherwise full WSS-M2P181-C specification testing is required Design Verification Testing (DV or pre-DV) is done on plaques by the paint supplier and is covered in the applicable paint material specification.
21、 Product/Process Validation Testing (PV) is done on production painted parts as defined in Table 1. 3.2.8 Cure Profile A temperature part profile curve (Time/Temp) from the production process for the part must be included in the PPAP. 3.3 FILM PROPERTIES 3.3.1 Color (FLTM BI 109-01 Visual Assessment
22、) (SAE J1545, Three-Angle CMC) Shall match the Master Approved Sample color panel or the initial sample as approved by Design Center. Copyright 2014, Ford Global Technologies, LLC Page 3 of 11 ENGINEERING MATERIAL SPECIFICATION WSS-M2P181-C 3.3.2 Gloss Report (FLTM BI 110-01, ASTM D523) As released
23、by Engineering: 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 33 - 38 G: 60 Glossmeter 17 - 23 H: 60 Glossmeter 7 - 13 J: 60 Glossmeter 4 - 6 K: 60 Glossmeter 2 - 4 L: 60 Glossmeter 0.5 - 2.0 N: 60 Glossm
24、eter 1.8 - 2.4 R: 60 Glossmeter 1.2-1.6 Shall match the Master Approved Sample color panel or the initial sample as approved by Design Center. 3.3.3 Film Thickness, min (See Table 1, Note 3) As defined in (ASTM B487, PELT or equivalent) paragraph 3.2.3 All areas of the component visible after assemb
25、ly must be evaluated/tested, including flanges, parting lines, styling lines and grooves. These ranges are considered to be requirements unless otherwise supported by testing data agreed to by Materials Engineering and noted on the MCDCC. 3.3.4 Film Thickness (Repair) 230 micrometers max (ASTM B487,
26、 PELT or equivalent) There shall be no more than 2 in-department repairs as defined in para. 3.2.4. All areas of the component visible after assembly must be evaluated/tested, including flanges, parting lines, styling lines and grooves. 3.4 RESISTANCE PROPERTIES 3.4.1 Paint Adhesion (See Table 1, No
27、te 3) Less than 5% paint (FLTM BI 106-01, Method D for flat area & removal of any paint Method E for curved/radius areas, knife blade) layer with no complete diamonds removed. All areas of the component visible after assembly must be evaluated/tested, including flanges, parting lines, areas subject
28、to post-mould treatment, styling lines and grooves. Lightly hand sand paint film surface (10 double rubs, moderate pressure) with P600 paper until dull, before scribe operation and checking adhesion. Copyright 2014, Ford Global Technologies, LLC Page 4 of 11 ENGINEERING MATERIAL SPECIFICATION WSS-M2
29、P181-C 3.4.2 Water Resistance No blistering, dulling, (FLTM BI 104-01, 240h, Scribe per 3.4.1) softening, loss of adhesion greater than 5% and/or any other film failure. Adhesion shall be tested according to Para 3.4.1 within 30 minutes after removal from water. 3.4.3 Hydrolysis Resistance Rating 4
30、- 5 min (FLTM BI 106-03, 14 & 28 days, AATCC Evaluation Procedure 1/ISO 105-A02) Test samples at 14 days and 28 day exposures and must meet the Adhesion testing performance requirements per Para. 3.4.1. Adhesion testing within 60 minutes after removal. If an adhesion failure occurs during the Adhesi
31、on Testing, retest in another area to verify. 3.4.4 Fluid Spotting Resistance Rating 4 5 min (FLTM BI 168-01, Method A and B, AATCC Evaluation Procedure 1/ISO 105-A02) Test Fluids: ( Body and Exterior Trim use) No color dulling, surface distortion or permanent softening permitted. After exposure Adh
32、esion testing performance must be met per Para. 3.4.1 within 60 minutes after exposure. 3.4.5 Resistance to Acid Spotting Rating 4 5 min (FLTM BI 113-02, AATCC Evaluation Procedure 1/ISO 105-A02) No color dulling, surface distortion or permanent softening permitted After exposure Adhesion testing pe
33、rformance must be met per Para. 3.4.1 within 60 minutes after exposure. 3.4.6 Mar Resistance A & B Gloss Materials 70% Gloss retention (FLTM BI 161-01) No visual Mar at all Angles 3.4.7 Scratch Resistance (FLTM BO 162-01) Requirement at 2 N load Scratch: Rating 2 max No Whitening/Color Change at any
34、 angle Marring: Rating 2 max Requirement at 7 N load Whitening/Color Change Rating 1 max Copyright 2014, Ford Global Technologies, LLC Page 5 of 11 ENGINEERING MATERIAL SPECIFICATION WSS-M2P181-C 3.4.9 Chip Resistance 3.4.9.1 Grit Blast, Split Shot Rating 4 min (FLTM BI 157-06) 3.4.9.2 Stone Chip (S
35、AE J400, 1.4 L at 23 +/- 2 C & -20 +/- 2 C, and 4.7 L at 23 +/- 2 C) Topcoat systems to be tested will include: first run panel, 1.4 L Rating 5B or 97% paint retention no chips 3 mm Dia first run panel, 4.7 L Rating 4B or 95% paint retention, no chips 3 mm Dia first run plus two in-line repairs, 1.4
36、 L only Rating 3B or (as defined in para. 3.2.4) 93% paint retention no chips 3 mm Dia Chipping is identified as intercoat adhesion loss between any adjoining layers revealing dis-similar colors, scuffing is acceptable. Chipping metrics may be obtained by image analysis software if available. 3.4.10
37、 Environmental Cycling, Total of 15 cycles Rating 4 - 5 min (FLTM BQ 104-07, Procedure 1 or 10, AATCC Evaluation Procedure 1/ISO 105-A02) No evidence of cracks, no blistering , no change in appearance or failure when compared with an original material approval. After exposure Adhesion testing perfor
38、mance must be met per Para. 3.4.1 within 60 minutes after exposure. Note: For procedure 1 test pieces shall be maintained at 38 C+/-2 C and 95-98% R.H. during any weekend break in cycling 3.4.11 High Performance Adhesion (See Table 1, Note 3) All areas of the component visible after assembly must be
39、 evaluated/tested, including flanges, parting lines, areas subject to post-mould treatment, styling lines and grooves. 3.4.11.1 Thermal Shock Rating 19 min (FLTM BI 107-05) Alternate method, (preferred): 3.4.11.2 Resistance Against High Pressure Cleaner 2 mm2max (FLTM BO 160-04, Method B & Method C)
40、 For Method B prior to testing the painted surface shall be X-scribed through to the substrate (30 angle). The test must be performed on the X-scribe. Copyright 2014, Ford Global Technologies, LLC Page 6 of 11 ENGINEERING MATERIAL SPECIFICATION WSS-M2P181-C For Method C prior to test run Split Shot
41、per FLTM BI 157-06 (1stshot only) then run test at 23C. No X-scribe. The test method must be noted in initial submission package 3.4.12 Heat Resistance Rating 4 5 min (7days at 80 +/-2 C, AATCC Evaluation Procedure 1/ 790 MPa 100 mm 3.5.2 Resistance to Cold Impact, Bumper Cover / Fascia Only The bum
42、per cover/fascia material must be selected from the bumpers subsystem material strategies and comply with cold temperature requirements which are both located in EKB: https:/ For exceptions, contact Lead Engineering Vehicle Activity. 3.5.4 Resistance to Cold Impact, Cowl Vent / Leaf Screen Only (RQT
43、 010815-008798 (legacy number LS-0002) The cowl vent / leaf screen cold impact requirement shall follow the existing requirement in the SDS, RQT 010815-008798, (legacy number LS-0002). 3.5.5 Resistance to Cold Impact, All Exterior Parts not captured in 3.5.1 & 3.5.2 (RQT 010800-011094 (legacy number
44、 OR-0020) The cold impact requirement shall follow the existing requirement in the SDS, RQT 010800-011094 (legacy number OR-0020). The operating conditions should follow steps 7 and 8. Where part geometry restricts impact locations, discuss with design and release engineer. Copyright 2014, Ford Glob
45、al Technologies, LLC Page 7 of 11 ENGINEERING MATERIAL SPECIFICATION WSS-M2P181-C 3.6 RESISTANCE TO EXTERIOR WEATHERING 3.6.1 Accelerated Weathering ASTM D7869 (preferred) SAE J2527 Boro/Boro New Color Approved Technology 2250 hours 3000 hours New Paint Technology 3750 hours 6000 hours 3.6.1.1 Color
46、 Change Rating 4 min (AATCC Evaluation Procedure 1/ ISO 105-A02, prior to 3.6.1.4) Wiping with wet clean cloth allowed no polishing allowed 3.6.1.2 Gloss Change (A & B gloss only) 25% max (FLTM BI 110-01, prior to 3.6.1.4) 3.6.1.3 Adhesion, X-Scribe 90) 57 / 44 62 / 49 50 / 37 Medium Metallic (L15 5
47、0-89) 60 / 47 65 / 52 53 / 40 Dark Metallics (L15 75) 62 / 49 67 / 54 55 / 42 Medium Solids (L15 30-75) 65 / 52 70 / 57 58 / 45 Dark Solids (L15 30) 67 / 54 72 / 59 60 / 47 Note: These ranges are for information only 4.4 SUPPLIERS ONGOING RESPONSIBILITY All materials must be equivalent in all charac
48、teristics to the material 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 Copyright 2014, Ford Global T
49、echnologies, LLC Page 9 of 11 ENGINEERING MATERIAL SPECIFICATION WSS-M2P181-C Supplier Technical Assistance (STA), Purchasing, and Materials Engineering activities of the proposed changes (with reasons) by submission of a completed Suppliers Request for Engineering Approval, SREA. For parts and components using Ford Engineering Material Specifications, all samples tested to the specifications for Design Verification (DV), Production Verifica
