FORD WSK-M32J125-A-1990 PAINT CLEARCOAT IN BASECOAT CLEARCOAT SYSTEM BAKING EXTERIOR TOP COAT《汽车外部的外涂层用底涂层 透明涂层系统中用烘干式透明涂层油漆》.pdf
《FORD WSK-M32J125-A-1990 PAINT CLEARCOAT IN BASECOAT CLEARCOAT SYSTEM BAKING EXTERIOR TOP COAT《汽车外部的外涂层用底涂层 透明涂层系统中用烘干式透明涂层油漆》.pdf》由会员分享,可在线阅读,更多相关《FORD WSK-M32J125-A-1990 PAINT CLEARCOAT IN BASECOAT CLEARCOAT SYSTEM BAKING EXTERIOR TOP COAT《汽车外部的外涂层用底涂层 透明涂层系统中用烘干式透明涂层油漆》.pdf(13页珍藏版)》请在麦多课文档分享上搜索。
1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1990 02 01 C01031532 Released C. E. Herriott concurred J. SchultWP 3948-a Page 1 of 13PAINT, CLEAR COAT IN BASE COAT/CLEAR COAT WSK-M32J125-ASYSTEM, BAKING, EXTERIOR TOP COAT1. SCOPEThe material def
2、ined by this specification is a clear coat of a basecoat/clear coat system required to provide the best exterior qualitymetallic finish. It consists of a thermosetting acrylic clear top coatresin and Ultra Violet light absorber package to improve weatherdurability, combined with a physical drying me
3、tallic base coat, whichare applied wet on wet and concurrently stoved. It shall be suitable forspray application.2. APPLICATIONThis specification was released originally for a material used as aclearcoat for a wet on wet final colour top coat system on automotivebodies and other exterior parts. It s
4、hall be satisfactory for use overspecified primers, primer surfacers or over baked enamel, as in repairor tu-toning operations.3. REQUIREMENTS3.1 STATISTICAL PROCESSSuppliers must conform to the requirements of Ford Quality SystemStandard Q-101. A mutually acceptable Control Plan as describedtherein
5、 is required for material/source approval. Appropriatestatistical tools must be used to analyze process/product data sothat variation in the final product is continually reduced.3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company in its option, may conduct infrared and/orthermal
6、 analysis of materials/parts supplied to thisspecification. The IR spectra and thermograms established forinitial approval shall constitute the reference standard andshall be kept on file at the designated Material Laboratory. Allsamples shall produce IR spectra and thermograms that correspondto the
7、 reference standard when tested under the same conditions.ENGINEERING MATERIAL SPECIFICATIONWSK-M32J125-AWP 3948-b Page 2 of 133.3 ULTRA VIOLET SPECTROGRAPHIC ANALYSIS(FLTM tbd)All approved materials shall contain with Initial Sample Reportan UV-spectroscopic analysis. This shall be recorded and fil
8、edby Quality Control or relevant Testing Laboratories of the FordMotor Company.Subsequent material UV-spectroscopic analysis shall correspond tothe data of the Initial Sample.3.4 CONDITIONINGAll panels shall be aged for 72 h at 23 +/- 2 C or 16 h at 43 +/-2 C before testing for resistance properties
9、 unless otherwisespecified.In the event of differences between test resu lts, the resultsafter ageing at room temperature shall govern.All tests according to this specification shall be performed in acontrolled atmosphere of 23 +/- 2 C and 50 - 65 % relativehumidity if not otherwise specified.3.5 FL
10、ASH POINTThe flash point shall conform to the safety regulationsapplicable to the plant and/or country where the material shallbe used.3.6 COMPOSITION3.6.1 ResinEssentially an acrylic and melamine formaldehydesynthetic resin system capable of meeting thisspecification requirements.3.6.2 Pigment None
11、The colourless clear coat shall not change the basecoat colour but give enhanced appearance, colour,lustre and performance to meet the requirements of thisspecification.3.6.3 SolventThe volatile portion shall contain sufficient activesolvents to give satisfactory adhesion.The properties of solvents
12、in the volatile portionshall be so arranged that the clear coat will level outsatisfactory on spray application. The volatility ofthe solvents is to be so chosen that the clear coatwill give a dry film thickness up to 45 micrometrewithout sagging and with satisfactory freedom fromroughness or dry sp
13、ray.ENGINEERING MATERIAL SPECIFICATIONWSK-M32J125-AWP 3948-b Page 3 of 133.6.4 Base CoatClear coat meeting this specification shall be totallycompatible with the Ford Engineering approved base coatWSK-M32J124-A or approved equivalent materials. Afterbaking to the required conditions the base coat/cl
14、earcoat system shall present an exterior topcoat finish ofthe highest quality.3.6.5 Specific CompositionWhen it is necessary to obtain specific data regardingmaterial formulation, it is understood that thesupplier will furnish such data on request.3.6.6 Ultra Violet Light AbsorberThe clear coat shal
15、l contain sufficient amounts ofsuitable Ultra Violet light absorber packages. Thesewill be selected by the supplier to provide long termdurability.3.6.7 Special DataAll initial and batch submissions must indicatedensity, non-volatile content, and volume solids of thematerial as supplied on the sampl
16、e report.3.7 PHYSICAL PROPERTIES3.7.1 Non-volatile Initial Sample(FLTM BI 102-01) +/- 1,0 %Minimum solid content 32,0 %unless otherwise releasedThese solid limits apply to clear coats adjusted to aviscosity of 35 s Ford Cup 3, at 25 C (FLTM BI 111-01).Solvents may be specified by vendor but shall be
17、 FordProduct Engineering Approved prior to use.3.7.2 Density Initial Sample(ASTM D 1475) +/- 0,02 g/mL3.7.3 Viscosity(FLTM BI 111-01, Ford Cup 3, 25 C)Package Viscosity Initial Sample+/- 5 sENGINEERING MATERIAL SPECIFICATIONWSK-M32J125-AWP 3948-b Page 4 of 133.7.4 Shelf StabilityDuring a storage of
18、3 months at room temperature, theclear coat as received shall not gel or show anyturbidity upon standing and must be free from settlingwhich cannot be dispersed by normal agitation. Theviscosity of the material shall not increase in excessof 20 s (FLTM BI 102-03, Ford Cup 3, 25 C)3.7.5 Solvent Emiss
19、ions max 0,096 kg/L(ASTM D 3960)This requirement is as deter mined by the United StatesEnvironmental Protection Agency Reference Method #24but is only applicable to materials used in the USA.3.7.6 Volume Solids Not less than(FLTM BI 154-02) Initial Sample3.8 PREPARATION OF TEST PANELS(FLTM BI 103-02
20、, Method B, b)3.8.1 SubstrateFord Engineering Approved Standard Steel Test Panelscoated with Ford Engineering approved zinc phosphateand prepared in accordance with Ford ManufacturingStandard U-MA18004/U-MA18005 or Equivalent.3.8.2 Cathodic ElectrocoatFord Engineering approved current production mat
21、erials.Apply the above primer to a minimum dry film thicknessof 25 micrometre and bake as defined in relevantmaterial specification.3.8.3 Primer SurfacerFord Engineering approved current production material.Apply the above primer to a minimum dry film thicknessof 30 micrometre, and bake as defined i
22、n relevantmaterial specification.Do not sand the primer surface.3.8.4 Base CoatApply approved base coat agai nst specification WSK-M32J124-A (reduced to spray viscosity as specified byvendor) to a dry film thickness of 15 - 20 micrometre.ENGINEERING MATERIAL SPECIFICATIONWSK-M32J125-AWP 3948-b Page
23、5 of 133.8.5 Clear CoatApply clear coat under test (reduced to spray viscosityas specified by vendor) to a dry film thickness of 35 -45 micrometre.Minimum total dry film thicknessBase coat and clear coat 50 micrometre3.8.6 Flash-Off Time1 minute between base and clear coat application3.8.7 Baking Cy
24、clesBase coat and clear coat baked simultaneously3.8.7.1 Standard Bake Bake 10 minutesat 130 C metaltemperature.3.9.1 Colour3.9.2.1 Gloss3.9.2.2 Gloss after re-bake3.10.4 Hardness3.11 Resistance properties includingAdhesion3.12 Weathering3.13.1 Repair colour match.3.8.7.2 RebakeStandard Bake and the
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