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1、900637900033O=l632kZIGENERALMOTORSENGINEERINGSTANDARDSMaterialsandProcesses-ProceduresPROCEDURESFORLABORATORYACCELERATEDEXPOSUREOFAUTOMOTIVEMATERIALSGM9125P1SCOPE.Thisstandarddescribesthelaboratoryproce-3.2.1-lAllholesoredgesonpanelsshouldbesealedtoduresusedtodeterminetheresistanc
2、etodegradationofpreventcontaminationoftestsamples.automotivematerialswhensubjectedtoartificiallightsources.Itdescribesexposurestosunshinecarbonarc,xenon3.2.2Procedure.Alltestspecimensandtestapparatuswillarc,fluorescentultravioletlightandcondensationapparatus,becontrolledperASTMG53
3、.Theexposureconditionwillbeandatwincarbonarc.MaterialspecificationswilldeterminevariedfromtheASTMmethodasfollows:whichlightsourceshallbeused.3.2.2.1Cycle:2EQUIPMENTREQUIRED.8hofUVat70C--`,,``,``,,````,,,,`,,,``,````-`-`,,`,,`,`,,`---2.1SunshineCarbonArcWeather-Qmeter,TypeE.(Avail-
4、4hofcondensationat50CablefromTheAtlasElectricDevicesCompany,4114N.RavenswoodAve.,Chicago,IL60613)3.2.2.1.1Thetestapparatusisruncontinuously,24hoursaday,7daysaweek.2.2FluorescentUltravioletLightandCondensationAppa-ratus.(QUVTester:AvailablefromTheQ-PanelCompany,3.2.2.2Aminimumof6sp
5、ecimensrepresentingthesame26200FirstSt.,ClevelandOH44145;UVCONTester:samplewillbepreparedandexposed.AvailablefromAtlasElectricDevices,4114N.RavenswoodAve.,ChicagoIL60613)3.2.2.3ThespecimenswillbestartedatthebeginningoftheWcycle.2.3TwinCarbonArc,ModelDMC.(AvailablefromTheAtlasElect
6、ricDevicesCompany,4114N.RavenswoodAve.,3.2.2.4ThespecimenswillberemovedattheendoftheChicago,1160613)equippedwiththefollowing:condensationcycle.2.3.1Fishtailspraynozzles$19-4503-01~FT-12.3.2.2.5Onespecimenwillberemovedeachweekforaperiodof6weeks(oratcompletefailureiflessthan6weeks)2
7、.3.2Camg60,g81,or,ll.andevaluated.2.3.3SprayshieldIt19-4620-00.3.2.3Arecordwillbekeptwitheachsetofsamplesexposedgivingthefollowinginformation:2.3.4Specimenholders#CD-LSR,orequivalent.Laboratoryrequestnumber.3OPERATINGCONDITIONS.Sourceofapparatusused.Cycle.3.1SunshineCarbonArcWeath
8、er-Qmeter,TypeE.Datestarted,datee
