ASTM G154-06

Designation:G154–06StandardPracticeforOperatingFluorescentLightApparatusforUVExposureofNonmetallicMaterials1ThisstandardisissuedunderthefixeddesignationG154;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.Note—AfootnotewasaddedtoTableX2.1,TableX2.3wasadded,anewNoteX2.8wasadded,andtheyeardatewaschangedonJune5,2006.1.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:2D3980PracticeforInterlaboratoryTestingofPaintandRelatedMaterialsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethodG53PracticeforOperatingLight-andWater-ExposureApparatus(FluorescentUV-CondensationType)forExpo-sureofNonmetallicMaterialsG113TerminologyRelatingtoNaturalandArtificialWeatheringTestsforNonmetallicMaterialsG151PracticeforExposingNonmetallicMaterialsinAc-celeratedTestDevicesThatUseLaboratoryLightSources2.2CIEStandard:CIE-Publ.No.85:RecommendationsfortheIntegratedIrradianceandtheSpectralDistributionofSimulatedSolarRadiationforTestingPurposes32.3ISOStandards:ISO4582,Plastics—DeterminationoftheChangesofCo-lourandVariationsinPropertiesAfterExposuretoDay-lightUnderGlass,NaturalWeatheringorArtificialLight4ISO4892-1,Plastics—MethodsofExposuretoLaboratoryLightSources,Part1,Guidance4ISO4892-3,Plastics—MethodsofExposuretoLaboratoryLightSources,Part3,FluorescentUVlamps4ISODIS11507,PaintandVarnishes—ExposureofCoat-ingstoArtificialWeatheringinApparatus—ExposuretoFluorescentUltravioletandCondensationApparatus43.Terminology3.1Definitions—ThedefinitionsgiveninTerminologyG113areapplicabletothispractice.1ThispracticeisunderthejurisdictionofASTMCommitteeG03onWeatheringandDurabilityandisthedirectresponsibilityofSubcommitteeG03.03onSimulatedandControlledExposureTests.CurrenteditionapprovedJune5,2006.PublishedJune2006.Originallyapprovedin1997.Lastpreviouseditionapprovedin2005asG154–05.2ForreferencedASTMstandards,visittheASTMwebsite,@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.3AvailablefromSecretary,U.S.NationalCommittee,CIE,NationalInstituteofStandardsandTechnology(NIST),Gaithersburg,MD20899.4AvailablefromAmericanNationalStandardsInstitute(ANSI),25W.43rdSt.,4thFloor,NewYork,NY10036.1Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.3.2DefinitionsofTermsSpecifictoThisStandard—Asusedinthispractice,thetermsunlightisidenticaltothetermsdaylightandsolarirradiance,globalastheyaredefinedinTerminologyG113.4.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.4.4Comparisonofresultsobtainedfromspecimensexposedindifferentmodelsofapparatusshouldnotbemadeunle