NF C93-400-19-3-1998 电子设备用电机元件.基本试验程序和测量方法.第19部分:耐化学制品试验.第3节:试验19c:液流阻力

上一篇: NF Z83-581-7-1998 蜂窝式数字电信系统(第2段).半速语音服务.第7部分:GSM半速语音编解码器用ANSI-C编码(GSM06.06)
下一篇: NF C93-430-6-1998 印刷电路板用频率低于3MHz的连接器.第5部分:公称厚度为1.6mm(0.063in)的单面或双面印刷电路板用触点间距为2.54mm(0.1in)的棱形插座连接器和双部件连接器

【英文标准名称】:StandardSpecificationforPre-TreatmentsofIronorSteelforReducingRiskofHydrogenEmbrittlement
【原文标准名称】:钢铁预处理减小氢脆变危险的标准规范
【标准号】:ASTMB849-2002
【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(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:裂开;降解;氢脆;应力;电镀;热处理;金属;覆层;铁;应力断裂;合金;钢;变换
【英文主题词】:degradation;coatings;iron;alloys;heattreatment;cracking;stress;electroplating;stresscrackings;metals;conversion;steels;hydrogenembrittlement
【摘要】:
【中国标准分类号】:A29
【国际标准分类号】:77_080_01
【页数】:3P;A4
【正文语种】:英语


【英文标准名称】:StandardPracticeforDeterminingVolatileOrganicCompound(VOC)ContentofPaintsandRelatedCoatings
【原文标准名称】:涂料及相关涂层中挥发性有机化合物含量测定的标准实施规范
【标准号】:ASTMD3960-2005
【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】:D01.21
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:工艺;颜色;挥发物测定;覆层;测定;涂料;涂漆
【英文主题词】:testprecision;VOC;VOCcalculations;VOCcontent;VOCcontentofpaint
【摘要】:ThispracticediscussesapplicableASTMtestmethodsusedinthedeterminationoftheVOCcontentofpaintsandrelatedcoatingsandprovidesequationsforcalculatingtheVOCcontentexpressedasthemassofVOC:(1)perunitvolumeofcoatinglesswaterandexemptvolatilecompounds,and(2)perunitvolumeofcoatingsolidsand(3)perunitmassofcoatingsolids.VolatileorganiccompoundcontentisusedtocomparetheamountofVOCreleasedfromdifferentcoatingsusedforthesameapplication,thatis,tocoatthesameareatothesamedryfilmthickness(assumingthesameapplicationefficiency).VOCcontentdataarerequiredbyvariousregulatoryagencies.OnlytheexpressionofVOCcontentasafunctionofthevolumeofcoatingsolidsgivesalinearmeasureofthedifferenceinVOCreleasedfromdifferentcoatingsusedforthesameapplication.Note48212;Thusassumingthesametransferefficiency,acoatingwithVOCcontentof3lbofVOC/galofsolidswouldreleasex00BD;theVOCthatwouldacoatingwith6lbofVOC/galofsolids.WhenVOCcontentisexpressedasafunctionofthevolumeofcoatinglesswaterandexemptsolvents,thevaluesobtaineddonotaccountfordifferencesinthevolumesolidscontentofthecoatingsbeingcompared:thisexpression,therefore,doesnotprovidealinearmeasureofthedifferenceinVOCemittedfromdifferentcoatingsusedforthesameapplication.Note58212;Thus,acoatingwithVOCcontentof3lbofVOC/gallesswaterandexemptvolatilecompoundswouldreleaseabout85%lessVOCthanacoatingwith6lbofVOC/gallesswaterandexemptvolatilecompounds.1.1Thispracticemeasuresthevolatileorganiccompound(VOC)contentofsolventborneandwaterbornepaintsandrelatedcoatingsasdeterminedfromthequantityofmaterialreleasedfromasampleunderspecifiedbakeconditionsandsubtractingexemptvolatilecompoundsandwaterifpresent.Note18212;Theregulatorydefinition,underthecontroloftheU.S.EPA,canchange.Toensurecurrency,contactthelocalairpollutioncontrolagency.1.2ThispracticeprovidesaguidetotheselectionofappropriateASTMtestmethodsforthedeterminationofVOCcontent.1.3CertainorganiccompoundsthatmaybereleasedunderthespecifiedbakeconditionsarenotcountedtowardcoatingVOCcontentbecausetheydonotparticipateappreciablyinatmosphericphotochemicalreactions.Suchnegligiblyphotochemicallyreactivecompoundsarereferredto,asexemptvolatilecompoundsinthispractice.Note28212;InformationontheUSEPAdefinitionofVOCandalistofthecurrentUSEPAapprovedexemptvolatilecompoundswhichhavebeenusedincoatings,areprovidedin.1.4VOCcontentiscalculatedasafunctionof(1)thevolumeofcoatinglesswaterandexemptvolatilecompounds,and(2)thevolumeofcoatingsolids,and(3)theweightofcoatingsolids.1.5ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A29
【国际标准分类号】:
【页数】:6P.;A4
【正文语种】: