【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】:ASTMC871-2008a
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:
【英文主题词】:chemicalanalysis;chloride;fluoride;silicate;sodium;thermalinsulation;Austeniticstainlesssteelthermalinsulation;Chemicalanalysis--insulation;Chlorideanalysis;Corrosion--insulatingmaterials;Corrosion--stress-corrosion;Ionanalysis;
【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.1.2Selectionofoneofthetestmethodslistedforeachoftheionicdeterminationsrequiredshallbemadeonthebasisoflaboratorycapabilityandavailabilityoftherequiredequipmentandappropriatenesstotheconcentrationoftheionintheextractionsolution.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q25
【国际标准分类号】:91_100_60
【页数】:5P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 实心聚乙烯绝缘同轴射频电缆质量分等标准 |
| 英文名称： | Coaxial radio-frequency cables with solid polyethylene dielectric insulation-Quality grading standard |
| 中标分类： |
电子元器件与信息技术 >>
电子元器件与信息技术综合 >>
技术管理 |
| 发布日期： | 1993-09-03 |
| 实施日期： | 1994-01-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 2010-01-20 |
| 出版日期： | 1900-01-01 |
| 页数： | 2页 |
适用范围
没有内容
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类： 电子元器件与信息技术 电子元器件与信息技术综合 技术管理