GM 4367M-1994 EXTERIOR TOPCOAT QUALIFICATION PROCEDURE

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1、GENERALMOTORSENGINEERINGSTANDARDSMaterialsandProcesses-PaintIIEXTERIORTOPCOATQUALIFICATIONPROCEDUREGM4367M1SCOPE.Thisspecificationdefiestheminimumper-1.3TOPCOAT998XxX.XSPECIFICATIONS.formance,compatibility,andprocessingrequirementsforThe998XXXX’sdescribethematerials’chemistry,bake,filmtechnology

2、approvalofALLautomotiveexteriortopcoats.buildandanyexceptionsoradditionstotheminimumperfor-TopcoatsandperformancelevelsaredefinedbyClasses,mancerequirementsofthisspecification.SpecificproductsareTypes,andindividual998XXXXspecifications.listedundertheappropriate998XXXXbysupplierandcodenumberinthe

3、MATSPCApprovedSourceList.1.1TOPCOATCLASS.ThetopcoatClassisdefinedbydurability,whichistheprobabilitythatthematerialwillper-1.4Oncequalifiedandapprovedtoa998xXxX,additionalformitsintendedfunctionunderspecificconditionsthroughitscriteriamustbemetpriortoproductionreleaseofanytopcoatintendedproductli

4、fecycle.Forthisspecification,durabilityismaterialtoassemblyplantsortooutsidesourcesforapplica-determinedbyweatheringperformance.(Floridaexposureandtiononpatts.acceleratedweatheringtests.)Table1Adefinesthegeneraltopcoatclasses.Chart1summarizesbaselineperformancecri-1.4.1Completionofplant-specific

5、compatibilitytestingofteria.anymaterialsnotevaluatedduringtechnologyapprovalperTABLE1A-TOPCOATCLASSESGM4495M.ClaEsGeneralDurabilityFunction1.4.2Completionofplant-specificprocessevaluationifout-Descriptionsideoftherangeusedfortechnologyapproval.1State-of-artbodyLighthandpolishingBC/CCrequiredafte

6、r5yrspanel1.4.3Completionofaplant-specificworkabilityevaluation.exposure.Nolossoffihnintegrityafter5+yrsof1.4.4DemonstrationthatGM4364M(PaintedBodytestingenvironment.Appearance)and/orGM4348M(PaintPartsAppearance)canbemetinplanttrials.MostrigidBC/CC.Lighthandpolishingsomeflkblesorrequiredat3-5yrs

7、ofpanel1.4.5Evaluationofcolors/pigmentationsperGM9620M.monocoatsexposuretorestoregloss&color.Nolossoffilm1.4.6Validationofplantspecificplasticormetalfinishedpartintegrityat5yrsoftestingperformancewiththetopcoatperGM4350M.env