ASTM-G154加速老化试验

Designation:G154–00ae1StandardPracticeforOperatingFluorescentLightApparatusforUVExposureofNonmetallicMaterials1ThisstandardisissuedunderthefixeddesignationG154;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.e1NOTE—TableX2.2wasaddededitoriallyinAugust2001.1.Scope1.1ThispracticecoversthebasicprinciplesandoperatingproceduresforusingfluorescentUVlight,andwaterapparatusintendedtoreproducetheweatheringeffectsthatoccurwhenmaterialsareexposedtosunlight(eitherdirectorthroughwindowglass)andmoistureasrainordewinactualusage.Thispracticeislimitedtotheproceduresforobtaining,measuring,andcontrollingconditionsofexposure.Anumberofexposureproceduresarelistedinanappendix;however,thispracticedoesnotspecifytheexposureconditionsbestsuitedforthematerialtobetested.NOTE1—PracticeG151describesperformancecriteriaforallexposuredevicesthatuselaboratorylightsources.ThispracticereplacesPracticeG53,whichdescribesveryspecificdesignsfordevicesusedforfluores-centUVexposures.TheapparatusdescribedinPracticeG53iscoveredbythispractice.1.2TestspecimensareexposedtofluorescentUVlightundercontrolledenvironmentalconditions.DifferenttypesoffluorescentUVlightsourcesaredescribed.1.3SpecimenpreparationandevaluationoftheresultsarecoveredinASTMmethodsorspecificationsforspecificmaterials.GeneralguidanceisgiveninPracticeG151andISO4892-1.Morespecificinformationaboutmethodsfordeter-miningthechangeinpropertiesafterexposureandreportingtheseresultsisdescribedinISO4582.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.6ThisstandardistechnicallysimilartoISO4892-3andISODIS11507.2.ReferencedDocuments2.1ASTMStandards:D3980PracticeforInterlaboratoryTestingofPaintandRelatedMaterials2E691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod3G53PracticeforOperatingLight-andWater-ExposureApparatus(FluorescentUV-CondensationType)forExpo-sureofNonmetallicMaterials4G113TerminologyRelatingtoNaturalandArtificialWeatheringTestsforNonmetallicMaterials4G151PracticeforExposingNonmetallicMaterialsinAc-celeratedTestDevicesThatUseLaboratoryLightSources42.2CIEStandard:CIE-Publ.No.85:RecommendationsfortheIntegratedIrradianceandtheSpectralDistributionofSimulatedSolarRadiationforTestingPurposes52.3ISOStandards:ISO4582,Plastics—DeterminationoftheChangesofCo-lourandVariationsinPropertiesAfterExposuretoDay-lightUnderGlass,NaturalWeatheringorArtificialLight6ISO4892-1,Plastics—MethodsofExposuretoLaboratoryLightSources,Part1,Guidance6ISO4892-3,Plastics—MethodsofExposuretoLaboratoryLightSources,Part3,FluorescentUVlamps6ISODIS11507,PaintandVarnishes—ExposureofCoat-ingstoArtificialWeatheringinApparatus—ExposuretoFluorescentUltravioletandCondensationApparatus63.Terminology3.1Definitions—ThedefinitionsgiveninTerminologyG113areapplicabletothispractice.3.2DefinitionsofTermsSpecifictoThisStandard—Asusedinthispractice,thetermsunlightisidenticaltothetermsdaylightandsolarirradiance,globalastheyaredefinedinTerminologyG113.1ThispracticeisunderthejurisdictionofASTMCommitteeG3onWeatheringandDurabilityandisthedirectresponsibilityofSubcommitteeG03.03onSimulatedandControlledExposureTests.CurrenteditionapprovedJune10,2000.PublishedSeptember2000.OriginallypublishedasG154–97.LastpreviouseditionG154–00.2Discontinued1998.See1998AnnualBookofASTMStandards,Vol06.01.3AnnualBookofASTMStandards,Vol14.02.4AnnualBookofASTMStandards,Vol14.04.5AvailablefromSecretary,U.S.NationalCommittee,CIE,NationalInstituteofStandardsandTechnology(NIST),Gaithersburg,MD20899.6AvailablefromAmericanNationalStandardsInstitute,11W.42ndSt.,13thFloor,NewYork,NY10036.1Copyright©ASTM,100BarrHarborDrive,WestConshohocken,PA19428-2959,UnitedStates.4.SummaryofPractice4.1Specimensareexposedtorepetitivecyclesoflightandmoistureundercontrolledenvironmentalconditions.4.1.1Moistureisusuallyproducedbycondensationofwatervaporontothetestspecimenorbysprayingthespeci-menswithdemineralized/deionizedwater.4.2Theexposureconditionmaybevariedbyselectionof:4.2.1Thefluorescentlamp,4.2.2Thelamp’sirradiancelevel,4.2.3Thetypeofmoistureexposure,4.2.4Thetimingofthelightandmoistureexposure,4.2.5Thetemperatureoflightexposure,and4.2.6Thetemperatureofmoistureexposure,and4.2.7Thetimingofalight/darkcycle.4.3Comparisonofresultsobtainedfromspecimensexposedinsamemodelofapparatusshouldnotbemadeunlessreproducibilityhasbeenestablishedamongdevicesforthematerialtobetested.4.4Comparisonofresultsobtainedfromspecimensexposedindifferentmodelsofapparatusshouldnotbemadeunlesscorrelationhasbeenestablishedamongdevicesforthematerialtobetested.5.SignificanceandUse5.1Theuseofthisapparatusisintendedtoinducepropertychangesassociatedwiththeendusec