【英文标准名称】:Insulatingliquids-Determinationofacidity-Part2Colourimetrictitration
【原文标准名称】:绝缘油.酸性的测定.第2部分:比色滴定法
【标准号】:IEC62021-2-2007
【标准状态】:现行
【国别】:国际
【发布日期】:2007-05
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC10
【标准类型】:()
【标准水平】:()
【中文主题词】:酸含量;酸度;酸;比色的;比色特征;比色测量;定义;测定;测定程序;电气工程;电绝缘材料;电绝缘装置;绝缘液体;绝缘材料;绝缘油;液体电绝缘材料;矿物油;测试;滴定法
【英文主题词】:Acidcontent;Acidity;Acids;Colorimetric;Colorimetriccharacteristics;Colorimetricmeasures;Colourimetricmeasures;Definitions;Determination;Determinationprocedures;Electricalengineering;Electricalinsulatingmaterials;Electricalinsulationdevices;Insulatingliquids;Insulatingmaterials;Insulatingoils;Liquidelectricalinsulatingmaterials;Mineraloils;Testing;Titration
【摘要】:ThispartofIEC62021describesaprocedurefordeterminationoftheacidityofunusedandusedelectricalmineralinsulatingoils.NOTE1Inunusedandusedmineralinsulatingoils,theconstituentsthatmaybeconsideredtohaveacidiccharacteristicsincludeorganicacids,phenoliccompounds,someoxidationproducts,resins,organometallicsaltsandadditives.Themethodmaybeusedtoindicaterelativechangesthatoccurinamineralinsulatingoilduringuseunderoxidizingconditionsthatmayormaynotbeshownbyotherpropertiesoftheresultingmineraloil.Theaciditycanbeusedinthequalitycontrolofunusedmineraloil.Asavarietyofoxidationproductspresentinusedmineraloilcontributetoacidityandtheseproductsvarywidelyintheircorrosionproperties,thetestcannotbeusedtopredictcorrosivenessofamineraloilunderserviceconditions.NOTE2Theacidityresultsobtainedbythistestmethodmayormaynotbenumericallythesameasthoseobtainedbypotentiometricmethods,buttheyaregenerallyofthesamemagnitude.ThepotentiometricmethodusesanendpointatpH11,3toensuretitrationofallspecies,whereasthecolourimetricmethodsusesanindicatorchangingcolouratapproximatelypH9,5.Thismayleadtoslightlyhigherresultsforoilswithaciditiesabove0,3mgKOH/goilwhenusingthepotentiometricmethod.
【中国标准分类号】:E38
【国际标准分类号】:29_040_10
【页数】:36P.;A4
【正文语种】:英语