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【英文标准名称】:StandardPracticeforPerformingAcceleratedOutdoorWeatheringofNonmetallicMaterialsUsingConcentratedNaturalSunlight
【原文标准名称】:用集中自然阳光光线法加速实施对非金属材料的室外风蚀的标准实施规程
【标准号】:ASTMG90-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:材料;非金属;工艺;阳光;试验;风化
【英文主题词】:durability;exposure;fresnel-reflector;weathering
【摘要】:1.1Fresnel-reflectingconcentratorsusingthesunassourceareutilizedintheacceleratedoutdoorexposuretestingofnonmetallicmaterials.1.2ThispracticecoversaprocedureforperformingacceleratedoutdoorexposuretestingofnonmetallicmaterialsusingaFresnel-reflectoracceleratedoutdoorweatheringtestmachine.Theapparatus(seeand)andguidelinesaredescribedhereintominimizethevariablesencounteredduringoutdooracceleratedexposuretesting.1.3Thispracticedoesnotspecifytheexposureconditionsbestsuitedforthematerialstobetestedbutislimitedtothemethodofobtaining,measuring,andcontrollingtheproceduresandcertainconditionsoftheexposure.Samplepreparation,testconditions,andevaluationofresultsarecoveredinexistingmethodsorspecificationsforspecificmaterials.1.4TheFresnel-reflectoracceleratedoutdoorexposuretestmachinesdescribedmaybesuitableforthedeterminationoftherelativedurabilityofmaterialsexposedtosunlight,heat,andmoisture,providedthemechanismsofchemicalorphysicalchange,orboth,whichcontroltheratesofaccelerationfactorsforthematerialsdonotdiffersignificantly.1.5Thispracticeestablishesuniformsamplemountingandin-testmaintenanceprocedures.AlsoincludedinthepracticearestandardprovisionsformaintenanceofthemachineandFresnel-reflectormirrorstoensurecleanlinessanddurability.1.6Thispracticeshallapplytospecimenswhosesizemeetsthedimensionsofthetargetboardasdescribedin.1.7Fortestmachinescurrentlyinuse,thispracticemaynotapplytospecimensexceeding13mm(1/2in.)inthicknessbecausecoolingmaybequestionable.1.8ValuesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundunitsinparenthesesareprovidedforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H25
【国际标准分类号】:
【页数】:11P.;A4
【正文语种】: