1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 03 2016 10 04 Editorial See Summary of Revisions for Details C. Taylor, NA 2016 02 02 Revised See Summary of Revisions for Details C. Taylor, NA / Global Team 2007 07 31 Activated J. Robincheck Controlled document at www.MATS Copyright 2
2、016, Ford Global Technologies, LLC Page 1 of 15 PAINT, ONE COMPONENT BASECOAT/CLEARCOAT WSS-M16J9-B2 OVER RIGID SUSTRATES, EXTERIOR PAINT, TWO COMPONENT BASECOAT/CLEARCOAT WSS-M16J9-B3 OVER RIGID SUSTRATES, EXTERIOR PAINT, ONE COMPONENT BASECOAT/TWO COMPONENT CLEARCOAT WSS-M16J9-B4 OVER RIGID SUSTRA
3、TES, EXTERIOR 1. SCOPE The materials defined by these specifications are paints, which consist of a basecoat and clear topcoat applied by a baked process. This specification also includes unique colors that require Tri or 4 coat systems. Tricoat colors consist of a pigmented groundcoat followed by a
4、 non-hiding midcoat over which is applied a clear or tinted clear. Four coat systems consist of a Basecoat, Clearcoat baked then the application of an effect basecoat with a clear or tinted clear. 2. APPLICATION These specifications were released originally for paints used as the final topcoat on ex
5、terior trim components made of rigid substrates, such as spoilers, appliqus, mirror housings, handles, roof racks, running boards. It shall be satisfactory for use over specified primers or over previously baked enamel, as in paint repair or tutone operations. 2.1 LIMITATIONS Bake temperature should
6、 not exceed softening temperature of substrate material as agreed upon by Ford Materials Engineering. 2.1.1 One Component, Basecoat/Clearcoat, Exterior Paint Systems for Rigid Substrates already approved to WSS-M33J7 do not need to retest for Technology approval to WSS-M16J9-B2/B3/B4. 3. REQUIREMENT
7、S Testing to be used for initial qualification of materials and shall be made on the basis of comparison with approved production material, chosen by the approving materials engineer. 3.1 APPROVED SOURCES This specification requires the use of approved sources. Only the sources identified on the For
8、d Approved Source List (ASL) can be used when this specification is listed on the drawing, CAD file, or other documents. The list of approved sources is located within Ford at or available externally through a Ford Materials Engineer. 3.2 COMPOSITION Both the basecoat and clearcoat contain UV absor
9、bers. The supplier will furnish the specific composition and concentration of the absorbers upon request. ENGINEERING MATERIAL SPECIFICATION WSS-M16J9-B2/B3/B4 Copyright 2016, Ford Global Technologies, LLC Page 2 of 15 3.2.1 Resin Shall be either a polyester, acrylic, modified urethane polymer or a
10、polyurethane. Minor amounts of modifiers and/or plasticizers are allowed. 3.2.2 Pigments Pigments are exterior automotive grade selected to match the Ford Motor Company master and meet the durability requirements. 3.2.3 Solvents The volatility of solvents will be such that there shall be no paint sa
11、gging, roughness or dry spray at specified film thicknesses. Solvents shall be compliant with any regional requirements (HAPs, etc.). 3.3 PHYSICAL PROPERTIES LIQUID STATE The following evaluation must be conducted on both the basecoat and clearcoat application viscosity. Throughout the application v
12、iscosity range, material shall be in compliance with local emission regulations. Property variation acceptability as identified below, shall be based on the recorded values of the originally approved production sample as approved by Ford Materials Engineering. This data will be used in developing co
13、ntrol plan requirements. 3.3.1 Non-Volatile Content, range Initial sample +/- 4% (ASTM D 1353) 3.3.2 Volatile Organic Compound, range Initial sample +/- 1% (ASTM D 3960) 3.3.3 Weight per Volume, range Initial sample +/- 0.03 g/ml (ASTM D 1475) 3.3.4 Volume Solids, range Initial sample +/- 2.0% (ASTM
14、 D 2697) 3.3.5 Viscosity Report (ASTM D 1200) 3.3.6 Stability No more than 30% (ASTM D 1849) viscosity increase permitted. 3.3.6.1 Shelf Stability, 90 days 3.3.6.2 Accelerated Stability, 60 C, 16 h 3.3.7 Resistivity 0.005 to 2.00 megohms (ASTM D 5682) Volatile solvents and other components affecting
15、 electrical conductivity shall be adjusted such that the resistivity at application viscosity shall be within specified limits. ENGINEERING MATERIAL SPECIFICATION WSS-M16J9-B2/B3/B4 Copyright 2016, Ford Global Technologies, LLC Page 3 of 15 3.4 PREPARATION OF TEST PANELS 3.4.1 Substrates Auto body s
16、teel, aluminum, pre-coated or electroplated zinc or zinc alloy coated steel and zinc die casting or as specified on Engineering Document. Rigid polymer and rigid polymer blends, SMC, ABS, PC/ABS, PA, etc. 3.4.2 Substrate Condition The surface to be coated must be cleaned to ensure the absence of oil
17、 or alkaline residues, fingerprints, corrosion, mold release agents, dirt, moisture, and other foreign materials. 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
18、specification, shall be approved by Materials Engineering and noted on the Ford Approved Source List (ASL) and/or Material Color Durability Compliance Certification (MCDCC). 3.4.3 Electrocoat For metallic substrates requiring e-coat, apply 17- 24 m and bake 10 minutes at 182 C metal temperature or a
19、s otherwise recommended. Record e-coat and oven type used. 3.4.4 Primer Apply 17 - 24 m DFT (Dry Film Thickness) of the primer or as otherwise recommended, as specified for the substrate. Primer must be applied over e-coat for paint system robustness. 3.4.5 Basecoat/Clearcoat Apply basecoat to requi
20、red dry film thickness by spray under conditions appropriate for basecoats, and flash as required. Apply clearcoat to required dry film thickness. Bake using appropriate bake schedule. Record paint and oven type used. (As developed by para 3.5). 3.4.6 Design Verification/Initial Qualification Test R
21、equirements as listed in Table 1 3.4.7 Aging After application of the top coat, all panels shall be aged at least 72 h at 23 +/- 2 C (preferred) or 16 hours at 45 +/- 1 C before testing. 3.4.8 Cure Process Window Must be developed per paragraph 3.5. ENGINEERING MATERIAL SPECIFICATION WSS-M16J9-B2/B3
22、/B4 Copyright 2016, Ford Global Technologies, LLC Page 4 of 15 3.5 PROCESS WINDOW DEFINITION - NEW RESIN TECHNOLOGIES ONLY The supplier shall perform a DOE utilizing response surface analysis to determine the Process Window of the system. The three variables to be included in the design are Bake Tim
23、e, Bake Temperature, and Film Thickness. An initial screening experiment should be run to determine what level will generate a window which includes testing to failure. This screening experiment should be reviewed with the Materials Engineer to set up the final DOE. The DOE shall include, but is not
24、 limited to, the conditions in paragraph 4.4. Response attributes to the DOE should be based on the materials tested and should include, but not be limited to: Film Thickness (Para 3.6.3, 3.6.4) Ultraviolet Light Transmittance (Para 3.6.5) Adhesion (Para 3.7.1) Water Immersion (Para 3.7.2) Chipping
25、(Para 3.7.8) Environmental Cycling (Para 3.7.9) High Performance Adhesion (Para 3.7.10) Adhesion after Repairs (Perform Para 3.7.1 on panel coated to Para 3.6.4) Report minimum, maximum, and target values for time, temperature, and film thickness. 3.6 FILM PROPERTIES 3.6.1 Color (FLTM BI 109-01, SAE
26、 J1545 Three Angle CMC) Shall match the Master Approved Sample color panel or the initial sample as approved by Design Center. 3.6.2 Gloss (FLTM BI 110-01, ASTM D 523) Shall match the Master Approved Sample color panel or the initial sample as approved by Design Center. Gloss A: 20 Glossmeter min 92
27、 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 Glossmeter 1.8 - 2.4 R: 60 Glossmeter 1.2 1.6
28、3.6.2.1 Gloss After Rebake 4 unit decrease max Rebake panel at target bake conditions per Para 3.5. ENGINEERING MATERIAL SPECIFICATION WSS-M16J9-B2/B3/B4 Copyright 2016, Ford Global Technologies, LLC Page 5 of 15 3.6.3 Film Thickness Report (FLTM BI 117-01, Metallic Substrates, minimum of 400x magni
29、fication, ASTM B 487, Non-Metallic Substrates, minimum of 400x magnification) Targeted Film Thickness: These ranges are considered to be requirements unless otherwise supported by testing data agreed to by Materials Engineering. E-coat 17-24 m Primer/Surfacer 1724 m Basecoat/Clearcoat 15-30 m /38-50
30、 m Tricoat (Basecoat/Midcoat/Clearcoat) 20-30 m /15-30 m /38-50 m 4 Layer (Base/Clear/Base/Clear) Values other than the above Target values shall be defined from process window (Para 3.5). If values do not meet the requirements listed here, they should be noted on the Material Color Durability Compl
31、iance Certification (MCDCC). 3.6.4 Film Thickness Report (FLTM BI 117-01, Metallic Substrates, minimum of 400x magnification, ASTM B 487, Non-Metallic Substrates, minimum of 400x magnification) Not to exceed 350 micrometers. There shall be no more than 3 in-department repairs. 3 in department repair
32、s = 1st run part + 2 in line repairs. 3.6.5 Ultraviolet Light Transmittance For each color, report the minimum film build of basecoat and of clearcoat over epoxy-free spray primer required to meet a maximum light transmission of no more than 0.1% at 360 nm and 0.5% at 400 nm. Fortified (with UV pack
33、age) clearcoat can be used for this evaluation. The equipment used for this measurement is an integrating sphere spectrophotometer or equivalent. These values shall be used to help determine minimum film thickness for the process window in section 3.5. 3.6.6 General The paint shall bake out to a pre
34、sentable serviceable film showing no craters, pinholes, seediness, abnormal roughness or excessive metallic mottling. It shall have a reasonable tolerance for ordinary cleaning, and exhibit no dulling or color change when washed with commercially available cleaners. 3.7 RESISTANCE PROPERTIES 3.7.1 P
35、aint Adhesion, Grade 2 max (FLTM BI 106-01, Method B Carbide tip scribe for metal & thermoset resins and knife blade for all other, note method used on test data) Lightly hand sand paint film surface (10 double rubs, moderate pressure) with P600 paper until dull, before scribe operation and checking
36、 adhesion. ENGINEERING MATERIAL SPECIFICATION WSS-M16J9-B2/B3/B4 Copyright 2016, Ford Global Technologies, LLC Page 6 of 15 3.7.2 Water Resistance No blistering, dulling, (FLTM BI 104-01, 240 h) softening, loss of adhesion, and/or any other film failure Adhesion shall be tested according to Para 3.7
37、.1 within 30 minutes after removal from water. 3.7.3 Condensing Humidity Resistance No blistering, dulling, (FLTM BI 104-02, Method A, 240 h softening, loss of AATCC Evaluation Procedure 1/ISO 105-A02) adhesion, and/or any other film failure Rating 4-5 min After exposure, adhesion testing performanc
38、e must be met per Para 3.7.1 within 60 minutes after exposure. Alternative Methods (Must be agreed upon by Materials Engineering) 3.7.3.1 Humidity Resistance 168hr at 85C & 90%R.H. Rating 4-5 min 3.7.3.2 Humidity Resistance 240hr at 85C & 90%R.H. Report After exposure, adhesion shall be tested and m
39、et per Para 3.7.1 within 60 minutes after exposure. No blistering, dulling, softening, and/or any other film failure. 3.7.4 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,
40、surface distortion or permanent softening permitted. After exposure, adhesion testing performance must be met per Para 3.7.1 within 60 minutes after exposure. 3.7.5 Acid Resistance Equal or better than (FLTM BI 113-01 except at 60 and current production 80 C for 30 minutes) material The following so
41、lutions shall be tested on candidate materials: Sulfuric acid (H2SO4) adjusted to pH of 2 Phosphoric acid (H3PO4), 0.5% Bee dropping mixture (47 g Formic Acid, 24 g Tannic Acid 10% in H2O, 24 g Honey, and 5 g Albumin 10% in H2O). Apply specified solutions 2 test panels. Place one each in preheated o
42、vens at 60 and 80 C, respectively. Remove after 30 minutes. Rinse any remaining solution with water. Examine panels for etching, discoloration, pitting, etc. 3.7.6 Mar Resistance A & B Gloss Materials 70% Gloss retention (FLTM BI 161-01) No visual Mar at all angles ENGINEERING MATERIAL SPECIFICATION
43、 WSS-M16J9-B2/B3/B4 Copyright 2016, Ford Global Technologies, LLC Page 7 of 15 3.7.7 Scratch Resistance 3.7.7.1 A & B Gloss Materials Fracture Load 8.0mN (DVM-0058-PA, Nano Scratch Test) Deformation 3 mm Dia first run plus three in-line repairs Rating 3B or 93% paint retention no chips 3 mm Dia Chip
44、ping 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. For 2k clearcoats, apply repairs at the maximum recommended amount of time after the original coa
45、t for good performance. Note the amount of time used on the test data. ENGINEERING MATERIAL SPECIFICATION WSS-M16J9-B2/B3/B4 Copyright 2016, Ford Global Technologies, LLC Page 8 of 15 3.7.9 Environmental Cycling, 15 cycles Rating 4-5 min (FLTM BQ 104-07, Procedure 1 or 10, evaluate after 20 h at 23
46、+/- 2 C AATCC Evaluation Procedure 1/ISO 105-A02) No evidence of cracks, no blistering, no change in appearance or other failure when compared with an original part. After exposure, adhesion testing performance must be met per Para 3.7.1 within 60 minutes after exposure. For procedure 1, test pieces
47、 shall be maintained at 38 +/- 2C and 95-98% RH during any weekend break in cycling. 3.7.10 High Performance Adhesion Thermal Shock Rating 20 max (FLTM BI 107-05) Alternate Method Resistance Against High Pressure Cleaner 2 mm2 max (FLTM BO 160-04, Method B & Method C) For Method B prior to testing t
48、he painted surface shall be X-scribed through to the substrate (30 angle). The test must be performed on the X-scribe. For Method C prior to test run Split Shot per FLTM BI 157-06 (1st shot only) then run test at 23C, no X-scribe. The test method must be noted in initial submission package. 3.7.11 H
49、eat Resistance Rating 4-5 min (7 days at 80 +/- 2 C, AATCC Evaluation Procedure 1, A & B gloss surfaces: ISO 105-A02) 90) 57 / 44 62 / 49 50 / 37 Medium Metallic (L15 50-89) 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 4.4 TOPCOAT PROCESSING CONDITIONS REQUIRED FOR PARA 3.5. Topcoat Bake Bake Condition
