1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1997 04 02 Activated Add.A2;Rev.Title,para 2,3.9,3.11,Del.3.7.5 E.Nunez1996 03 06 Activated E. NunezWP 3948-a Page 1 of 6 PRIMER SURFACER, 130 C BAKING TEMPERATURE, WSS-M6J175-ACHIP AND SCRATCH INHIBITING, REPAIR
2、 PARTSPRIMER SURFACER, 130 C BAKING TEMPERATURE, WSS-M6J175-A2CHIP AND SCRATCH INHIBITING, FULL BODIES1. SCOPEThe materials defined by these specifications are solvent-borne primersurfac ers, possessing good gloss, chip and scratch resistance, and enamelholdout.2. APPLICATIONThis specification is re
3、leased for materials used as primer surfacers overbaked electrocoated surfaces. The primer can be cured i n the enamel bakingsys tem at 130 C. It can be painted with solvent borne and water-bornetopcoat systems.WSS-M6J175-ATh e material defined by this specification is for repair parts used toreplac
4、e body parts damaged after the paint process.WSS-M6J175-A2The material defined by this specification is for bodies.3. REQUIREMENTS3.1 QUALITY SYSTEM REQUIREMENTSMaterial suppliers and part producers must conform to Quality SystemRequirements, QS-9000. Material specification r equirements are to beus
5、ed fo r initial qualification of materials. A Control Plan forong oing production verification is required. This plan must bereviewed and approved b y the relevant Ford Materials activity and/orFor d Supplier Technical Assistance (STA) prior to production partssubmission. Appropriate statistical too
6、ls must be used to analyzepr ocess/product data and assure consistent processing of thematerials.Part producers using this material in their products, must use Fordapproved materials and must conform to a process control plan whichhas been approved by STA and/or the relevant Materials Activity.ENGIN
7、EERING MATERIAL SPECIFICATION WSS-M6J175-A WSS-M6J175-A2WP 3948-b Page 2 of 6 3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/ortherma l analysis of material/parts supplied to this specification.The IR spectra and thermograms establis
8、hed for i nitial approval shallconst itute the reference standard and shall be kept on file at thedesignated material laboratory. All samples sha ll produce IR spectraand thermograms that correspond to the reference standard when testedunder the same conditions.3.3 CONDITIONING AND TEST CONDITIONSAl
9、l test values indicated herein are based on ma terial conditioned ina control led atmosphere of 23 +/- 2 C and 50 +/- 5 % relativehumidity for not less than 24 h prior to testing and tested under thesame conditions unless otherwise specified.3.4 COMPOSITION3.4.1 ResinsPolyester resins and suitable c
10、ross-linking components.3.4.2 PigmentsPigments and fillers to obtain the desired color andresistance properties.3.5 PHYSICAL PROPERTIES LIQUID STATE3.5.1 Non-Volatile Initial sample(FLTM BI 102-1) +/- 2 %, min 60 %3.5.2 Volatile Organic Compounds 0.24 kg/L(V.O.C.), max as sprayedThe volatile portion
11、 of this material shall meet theappli cable requirements of the local air pollution controlfor the assembly plants in which the primer is used.3.5.3 Viscosity Initial sample(FLTM BI 111-01) +/- 10 sFinal approval of a specific material viscosity shall be madeby the affected manufacturing activity. I
12、n all cases theviscosity shall be with in specification limits as identifiedon the material control plan.ENGINEERING MATERIAL SPECIFICATION WSS-M6J175-A WSS-M6J175-A2WP 3948-b Page 3 of 6 3.5.4 Stability 90 days(FLTM BI 102-03)The material shall be s tored at temperatures below 40 C awayfro m all so
13、urces of heat and sunlight. Under theseconditions, the materia l shall not settle so that it can notbe eas ily dispersed by agitation. After the storage, thematerial must pass all the specification requirements.3.5.5 Density (weight per volume) Initial Sample(ASTM D 1475) +/- 0.05 g/mL3.6 PREPARATIO
14、N OF TEST PANELS(FLTM BI 103-02, Method C)3.6.1 Substrates- WSB-M1A250 coated steel.WSB-M1A250 galvanized steel zinc phosphated pane ls conformingto the requirements of WSK-M3P1-C.3.6.2 ElectrocoatCurrently approved production electrocoat primer , applicationand film thickness as specified in the re
15、levant materialspecification.3.6.3 Primer Application- Dry Film Thickness 30 +/- 5 micrometers- Flash Time 3 minutes - Baking (min metal temperature) 10 minutes at 130 C 3.6.4 Topcoat RequirementsCurrently approved production basecoat/clearcoat enamel solidcolor as well as a medium metallic color. F
16、ilm thickness andapplication as specified in the relevant materia l engineeringspecification.3.7 APPEARANCE3.7.1 Color GrayShall match the approved color standard on file at Body andAssembly Paint Operations.3.7.2 Gloss, min Initial Sample(FLTM BI 110-01, 60 deg Glossmeter) +/- 5 deg3.7.3 LevelingTh
17、e primer film shall be smooth and level with a minimum oforange peel when applied at a dry film thickness of 35micrometers.ENGINEERING MATERIAL SPECIFICATION WSS-M6J175-A WSS-M6J175-A2WP 3948-b Page 4 of 6 3.7.4 HoldoutThere shall be no evidence of dulling or change or imageclar ity when enamel colo
18、r coat is applied over sanded orunsanded primer surfacer, and no difference in gloss of thecolor coat between sanded and unsanded primer. T here shall beno prominence of sand scratches.3.8 FILM PROPERTIES3.8.1 Dry Sanding CharacteristicsAfter baking, the primer shall dry sand (using a new sheet ofP4
19、00 and P800 grit non- stearate filled paper for each panel)smooth ly without clogging the paper and with a min of sandscratches.3.8.2 Adhesion, max Grade 2,(FLTM BI 106-01, Procedure B) less than 5 %adhesion loss3.9 RESISTANCE PROPERTIES3.9.1 Chip Resistance, max 5A SAE rating(SAE J400, 1 pint) No r
20、ust spots visible indicatingchip through to metalAfter chipping, panels shall be subjected to 24 h Salt Sprayper FLTM BI 103-01.3.9.2 Stone Chip Resistance, max Rating 4(FLTM BI 157-06)3.9.3 Salt Spray 240 h(FLTM BI 103-01)No blistering, rusting, or more than 3 mm rust or blistercreepa ge or loss of
21、 adhesion from a line scribed to baremetal.3.9.4 Water Immersion 480 h(FLTM BI 104-01)No blistering, loss of gloss or loss adhesion accepted.3.9.5 Condensing Humidity 240 h(FLTM BI 104-02, Procedure A)No blistering or loss of gloss.ENGINEERING MATERIAL SPECIFICATION WSS-M6J175-A WSS-M6J175-A2WP 3948
22、-b Page 5 of 6 3.9.6 Florida Exposure 12 Months(SAE J1976, Procedure A)Prepare panels as per para 3.6 shall be exposed in the Miami,Florida ambient area at 5 deg facing south. After exposure,the panels shall not exhibit any blistering, peeling, orother defect caused by the primer.3.9.6.1 Water Immer
23、sion, 16 h No blistering or(FLTM BI 104-04) adhesion loss3.9.7 Chalking ResistanceCurrent Production Clearcoat 12 monthsProduction Clearcoat without UV Stabilizer 3 monthsPrimed panels are paint ed with currently approved productionclearcoat as well as production clearcoat without U.V.stabil izers a
24、pplied at a dry film thickness of 25 - 35micrometers.3.9.7.1 Water Immersion, 16 h No blistering or(FLTM BI 104-04) adhesion loss3.10 PROCESS WINDOW DEFINITIONThe sup plier shall perform a Design of Experiment (Box-Behnken isrecommended) to determi ne the process window of the material. The 3variabl
25、 es to be included in the design are bake time, baketempe rature and film thickness. An initial screening experimentsho uld be run to determine what levels should be tested for thedesign variables. This screening experiment should be reviewed withthe materials engineer to set up the final DOE. Respo
26、nses to the DOEwill be based upon the materials tested and chosen from tests listedwithin this specification.3.11 COMPATIBILITYThe mat erial must be compatible with all related materials, i.e.,electrocoats and topcoats.WSS-M6J175-A2 ONLYAdditionally, the material must be compatible for all low bake
27、wet-on-wet ap plications, i.e., current production sealers, lower bodysideantichips, frontal surface antichips, blackout enamels. 3.12 ADDITIONAL REQUIREMENTSSpecific requirements for material and/or manufa ctured parts shall bespecified on the Engineering drawing, Engineerin g parts specificationan
28、d/or performance specification. All critical areas with respect tothese properties shall be clearly designated on the engineeringdrawing.ENGINEERING MATERIAL SPECIFICATION WSS-M6J175-A WSS-M6J175-A2WP 3948-b Page 6 of 6 3.13 FINAL APPROVAL/PRODUCTION TRIALFinal approval of all functional and sanding
29、 cha racteristics shall bemade by the manufacturing division using the mat erial or painted parton th e basis of a shop trial under production conditions (Form 371Report).3.14 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the materi
30、al upon which approval wasoriginally granted.Pri or to making any change in the properties, composition,constr uction, color, processing or labeling of the materialorig inally approved under this specification, whether or not suchchange s affect the materials ability to meet the specificationrequir
31、ements, the Supplier shall notify Purchasing, Toxicology andthe affected Materials Engineering activity of the proposed changesand obtain the written approval of the Materials Engineeringactivity. Test data, t est samples and a new code identification areto be submitted with the request.Substance re
32、strictions imposed by law, regulations or Ford, apply tothe materials addressed by this document. The restrictions aredefined in Engineering Materials Specification WSS-M99P9999-A1.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresponsible Materials E
33、ngineeri ng activity. Suppliers desiring approval ofthe ir materials shall first obtain an expression of interest from theaffec ted Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringactivity a completed copy of their la
34、boratory test reports, signed by aqualified and authorized representative of the test faci lity, demonstratingful l compliance with all the requirements of this specification (testresults, not nominal values), the material designation a nd code number, andtes t specimens for Ford evaluation. Fords engineering approval of amateri al will be based on its performance to this specification and on anassessment of suitability for intended processes and/or applications. Uponapprov al, the material will be added to the Engineering Material ApprovedSource List.
