【英文标准名称】:StandardTestMethodsforChemicalAnalysisofThermalInsulationMaterialsforLeachableChloride,Fluoride,Silicate,andSodiumIons
【原文标准名称】:可浸出氯化物,氟化物,硅酸盐及钠离子用绝热材料的化学分析的标准试验方法
【标准号】:ASTMC871-2011
【标准状态】:现行
【国别】:
【发布日期】:2011
【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】:C16.31
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:化学分析;氯化物;氟化物;硅酸盐;钠;隔热
【英文主题词】:chemicalanalysis;chloride;fluoride;silicate;sodium;thermalinsulation
【摘要】:Researchhasdemonstratedthatinadditiontothehalideionchloride;fluorideions,whendepositedandconcentratedonthesurfaceofausteniticstainlesssteel,cancontributetoexternalstresscorrosioncracking(ESCC)intheabsenceofinhibitingions.TwowidelyusedinsulationspecificationsthatarespecifictoESCCallowtheuseofthesameTestMethodsC692andC871forevaluationofinsulationmaterials.Bothspecificationsrequirefluorideionstobeincludedwithchlorideionswhenevaluatingtheextractableions.Chlorides(andfluorides)canbeconstituentsoftheinsulatingmaterialoroftheenvironment,orboth.Moistureintheinsulationorfromtheenvironmentcancausechlorides(andfluorides)tomigratethroughtheinsulationandconcentrateatthehotstainlesssteelsurface.Thepresenceofsodiumandsilicateionsintheinsulationhasbeenfoundtoinhibitexternalstresscorrosioncrackingcausedbychloride(andfluoride)ions,whethersuchionscomefromtheinsulationitselforfromexternalsources.Furthermore,iftheratioofsodiumandsilicateionstochloride(andfluoride)ionsisinacertainproportionintheinsulation,externalstresscorrosioncrackingasaresultofthepresenceofchloride(andfluoride)intheinsulationwillbepreventedoratleastmitigated(seealsoSpecificationC795).1.1Thesetestmethodscoverlaboratoryproceduresforthedeterminationofwater-leachablechloride,fluoride,silicate,andsodiumionsinthermalinsulationmaterialsinthepartspermillionrange.1.2Selectionofoneofthetestmethodslistedforeachoftheionicdeterminationsrequiredshallbemadeonthebasisoflaboratorycapabilityandavailabilityoftherequiredequipmentandappropriatenesstotheconcentrationoftheionandanypossibleioninterferencesintheextractionsolution.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:91_100_60
【页数】:5P.;A4
【正文语种】:
基本信息
| 标准名称： | 测定镜质体反射率的显微镜光度计技术条件 |
| 发布日期： | 2009-01-01 |
| 实施日期： | 2008-11-19 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
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所属分类： 综合 社会公共安全 犯罪鉴定技术 环保 保健与安全 犯罪行为防范