ASTM G140-2002(2008) 用湿蜡法测定大气氯化物沉淀速率的标准试验方法
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【英文标准名称】:StandardTestMethodforDeterminingAtmosphericChlorideDepositionRatebyWetCandleMethod
【原文标准名称】:用湿蜡法测定大气氯化物沉淀速率的标准试验方法
【标准号】:ASTMG140-2002(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2002
【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】:G01.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:atmosphericchloridedepositionrate;wetcandlemethod;Atmosphericchloridedepositionrate;Chlorideanalysis--atmospheric;Wetcandlemethod
【摘要】:Thistestmethodiscapableofgeneratingquantitativevaluesofatmosphericchloridedepositionspecifyingmilligramsofchlorideionspersquaremetreperday(orotherunitsderivedfromsuchvalues).Note18212;Chloridesintheatmosphereexistasasuspensionofliquiddropletsorsolidparticles.Theyaretransportedtosolidsurfacesbygravity,wind,orbrownianmotions.Thesetransportmechanismsaredirection-sensitivesothataverticalcylinderwillnotnecessarilyreceivethesamefluxasahorizontalplate,orobjectswithdifferentsizesandorientations.Therefore,theuseofthisapproachtoprovideanindicationofthedepositionofchloridesonobjectsinatmosphericexposuresmaynotbequantitativelyaccurate;however,thistechniquehasbeensuccessfulinclassifyingtheseverityofexposureinavarietyofmarinelocations.Thesiteswheresamplesaretobetakenandthesamplingtimeperiodsshouldbeestablished.Acontinuousprogramofmonthlyor30-dayexposuresisrecommendedforsitecharacterization.Seasonalmonitoringmaybeperformediftherearespecificperiodsofinterest.1.1Thistestmethodcoversawetcandledeviceanditsuseinmeasuringatmosphericchloridedeposition(amountofchloridesaltsdepositedfromtheatmosphereonagivenareaperunittime).1.2Dataonatmosphericchloridedepositioncanbeusefulinclassifyingthecorrosivityofaspecificarea,suchasanatmospherictestsite.Cautionmustbeexercised,however,totakeintoconsiderationtheseasonbecauseairbornechloridesvarywidelybetweenseasons.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z11
【国际标准分类号】:77_060
【页数】:4P.;A4
【正文语种】:英语
【原文标准名称】:用湿蜡法测定大气氯化物沉淀速率的标准试验方法
【标准号】:ASTMG140-2002(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2002
【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】:G01.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:atmosphericchloridedepositionrate;wetcandlemethod;Atmosphericchloridedepositionrate;Chlorideanalysis--atmospheric;Wetcandlemethod
【摘要】:Thistestmethodiscapableofgeneratingquantitativevaluesofatmosphericchloridedepositionspecifyingmilligramsofchlorideionspersquaremetreperday(orotherunitsderivedfromsuchvalues).Note18212;Chloridesintheatmosphereexistasasuspensionofliquiddropletsorsolidparticles.Theyaretransportedtosolidsurfacesbygravity,wind,orbrownianmotions.Thesetransportmechanismsaredirection-sensitivesothataverticalcylinderwillnotnecessarilyreceivethesamefluxasahorizontalplate,orobjectswithdifferentsizesandorientations.Therefore,theuseofthisapproachtoprovideanindicationofthedepositionofchloridesonobjectsinatmosphericexposuresmaynotbequantitativelyaccurate;however,thistechniquehasbeensuccessfulinclassifyingtheseverityofexposureinavarietyofmarinelocations.Thesiteswheresamplesaretobetakenandthesamplingtimeperiodsshouldbeestablished.Acontinuousprogramofmonthlyor30-dayexposuresisrecommendedforsitecharacterization.Seasonalmonitoringmaybeperformediftherearespecificperiodsofinterest.1.1Thistestmethodcoversawetcandledeviceanditsuseinmeasuringatmosphericchloridedeposition(amountofchloridesaltsdepositedfromtheatmosphereonagivenareaperunittime).1.2Dataonatmosphericchloridedepositioncanbeusefulinclassifyingthecorrosivityofaspecificarea,suchasanatmospherictestsite.Cautionmustbeexercised,however,totakeintoconsiderationtheseasonbecauseairbornechloridesvarywidelybetweenseasons.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z11
【国际标准分类号】:77_060
【页数】:4P.;A4
【正文语种】:英语
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