ASTMG快速紫外老化测试.pdf

ASTMG快速紫外老化测试.pdf

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Designation:

G15400ae1StandardPracticeforOperatingFluorescentLightApparatusforUVExposureofNonmetallicMaterials1ThisstandardisissuedunderthefixeddesignationG154;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon（e）indicatesaneditorialchangesincethelastrevisionorreapproval.e1NOTETableX2.2wasaddededitoriallyinAugust2001.1.Scope1.1ThispracticecoversthebasicprinciplesandoperatingproceduresforusingfluorescentUVlight,andwaterapparatusintendedtoreproducetheweatheringeffectsthatoccurwhenmaterialsareexposedtosunlight（eitherdirectorthroughwindowglass）andmoistureasrainordewinactualusage.Thispracticeislimitedtotheproceduresforobtaining,measuring,andcontrollingconditionsofexposure.Anumberofexposureproceduresarelistedinanappendix;however,thispracticedoesnotspecifytheexposureconditionsbestsuitedforthematerialtobetested.NOTE1PracticeG151describesperformancecriteriaforallexposuredevicesthatuselaboratorylightsources.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,PlasticsDeterminationoftheChangesofCo-lourandVariationsinPropertiesAfterExposuretoDay-lightUnderGlass,NaturalWeatheringorArtificialLight6ISO4892-1,PlasticsMethodsofExposuretoLaboratoryLightSources,Part1,Guidance6ISO4892-3,PlasticsMethodsofExposuretoLaboratoryLightSources,Part3,FluorescentUVlamps6ISODIS11507,PaintandVarnishesExposureofCoat-ingstoArtificialWeatheringinApparatusExposuretoFluorescentUltravioletandCondensationApparatus63.Terminology3.1DefinitionsThedefinitionsgiveninTerminologyG113areapplicabletothispractice.3.2DefinitionsofTermsSpecifictoThisStandardAsusedinthispractice,thetermsunlightisidenticaltothetermsdaylightandsolarirradiance,globalastheyaredefinedinTerminologyG113.1ThispracticeisunderthejurisdictionofASTMCommitteeG3onWeatheringandDurabilityandisthedirectresponsibilityofSubcommitteeG03.03onSimulatedandControlledExposureTests.CurrenteditionapprovedJune10,2000.PublishedSeptember2000.OriginallypublishedasG15497.LastpreviouseditionG15400.2Discontinued1998.See1998AnnualBookofASTMStandards,Vol06.01.3AnnualBookofASTMStandards,Vol14.02.4AnnualBookofASTMStandards,Vol14.04.5AvailablefromSecretary,U.S.NationalCommittee,CIE,NationalInstituteofStandardsandTechnology（NIST）,Gaithersburg,MD20899.6AvailablefromAmericanNationalStandardsInstitute,11W.42ndSt.,13thFloor,NewYork,NY10036.1CopyrightASTM,100BarrHarborDrive,WestConshohocken,PA19428-2959,UnitedStates.4.SummaryofPractice4.1Specimensareexposedtorepetitivecyclesoflightandmoistureundercontrolledenvironmentalconditions.4.1.1Moistureisusuallyproducedbycondensationofwatervaporontothetestspecimenorbysprayingthespeci-menswithdemineralized/deionizedwater.4.2Theexposureconditionmaybevariedbyselectionof:

4.2.1Thefluorescentlamp,4.2.2Thelampsirradiancelevel,4.2.3The