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【英文标准名称】:StandardPracticeforConductingExposuresinOutdoorGlass-CoveredExposureApparatuswithAirCirculation
【原文标准名称】:对空气流通的室外玻璃覆盖的曝光装置进行曝光的标准实施规程
【标准号】:ASTMG201-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:G03.02
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:cumulativespectralsensitivitycurve;degradation;durability;exposure;lightexposure;ultravioletradiation;weathering
【摘要】:Aswithanyacceleratedtest,theincreaseinrateofweatheringcomparedtoin-serviceexposureismaterialdependent.Resultsfromexposuresconductedtothispracticemayprovidegoodrankcorrelationtoresultsfromactualuseconditionsforonetypeofmaterialorproduct.Itshouldnotbeassumedthatthiswillbetrueforothermaterialsorproducts.Itisalwaysbesttoverifytheabilityofanacceleratedexposuretesttoproperlyrankthedurabilityofmaterialswithactualuseconditions.GuideG141providesinformationaboutusingrankcorrelation.Variationinresultsmaybeexpectedwhenoperatingconditionsarevariedwithintheacceptedlimitsofthispractice.Therefore,noreferenceshallbemadetoresultsfromtheuseofthispracticeunlessaccompaniedbyareportdetailingthespecificoperatingconditionsinconformancewithReportSection8.Thedurabilityofmaterialsinoutdoorusecanbeverydifferentdependingonthelocationoftheexposurebecauseofdifferencesinsolarradiation,moisture,heat,pollutants,andotherfactors.Therefore,itcannotbeassumedthatresultsfromexposureinasinglelocationwillbeusefulfordeterminingdurabilityrankingofmaterialsinadifferentlocation.Itisstronglyrecommendedthatatleastonecontrolmaterialbeexposedwitheachtest.Thecontrolmaterialshouldbeofsimilarcompositionandconstructionandbechosensothatitsfailuremodesarethesameasthatofthematerialbeingtested.Itispreferabletousetwocontrolmaterials,onewithrelativelygooddurability,andonewithrelativelypoordurability.Ifcontrolmaterialsareincludedaspartofthetest,theyshallbeusedforthepurposeofcomparingtheperformanceofthetestmaterialsrelativetothecontrols.1.1Thispracticecoversthebasicprinciplesandoperatingproceduresforusingoutdoorglass-coveredexposureapparatuswithaircirculation.Thispracticeislimitedtotheproceduresforobtaining,measuringandcontrollingconditionsofexposure.AnumberofexposureproceduresarelistedinAppendixX1;however,thispracticedoesnotspecifytheexposureconditionsbestsuitedforthematerialtobetested.1.2Fordirectweatheringexposures,refertoPracticeG7.Forexposuresbehindglasswithoutaircirculation,refertoPracticeG24.1.3Testspecimensareexposedtosolarradiationfilteredthroughglassunderpartiallycontrolledenvironmentaltestconditions.Differentglasstypesandoperatingparametersaredescribed.1.4SpecimenpreparationandevaluationoftheresultsarecoveredinASTMmethodsorspecificationsforspecificmaterials.MorespecificinformationfordeterminingthechangeinpropertiesafterexposureandreportingtheseresultsisdescribedinPracticesD5870,D2244andTestMethodD523.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A21
【国际标准分类号】:19_040
【页数】:6P.;A4
【正文语种】:英语