【英文标准名称】:Metallicandotherinorganiccoatings-Electrochemicalmeasurementofdiffusiblehydrogeninsteels-Barnacleelectrodemethod
【原文标准名称】:金属和其他无机覆盖物钢中可扩散氢的电化学测量
【标准号】:ISO15724-2001
【标准状态】:现行
【国别】:国际
【发布日期】:2001-12
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC107
【标准类型】:()
【标准水平】:()
【中文主题词】:测量技术;氢的浓度;金属覆层;棒钢;电化学方法;电极;无机材料;可扩散氢;钢板;表面处理;测量
【英文主题词】:Diffusiblehydrogen;Electrochemicalmethods;Electrodes;Hydrogenconcentration;Inorganicmaterials;Measurement;Measuringtechniques;Metalcoatings;Steelbars;Steelplates;Surfacetreatment
【摘要】:ThisInternationalStandarddescribesamethodthatusesanelectronichydrogendetectioninstrumentformeasuringrelative,diffusiblehydrogenconcentrationsinbaresteelsorinplatedsteelsafterthecoatinghasbeenremoved.Itisassumedthatthehydrogenisuniformlydistributedthroughoutapart.Themethoddoesnotmeasureactualhydrogenconcentration.However,oxidationcurrentdensitiesmeasuredagainsttimeprovideausefulindicationofrelativehydrogenconcentrationsand,therefore,themeasurementscanbeusedforcomparisonpurposes.Themethodmaybeusedasaqualitycontrolprocedureasitdoesprovideaquickmeansofmeasuringtheeffectivenessofpre-and/orpost-platingheattreatmentsorofmonitoringhydrogenuptakeduringplatingorduetocorrosion.Itisimportanttonotethattheabsenceoffailureinaparticulartestdoesnotprovideconfirmationofcompleteeliminationofhydrogenembrittlementbecausenoonetestmethodcanprovideallthedatanecessarytoevaluatethedegreeofhydrogendegradation.Forunplatedpartsthemethodisnon-destructive;however,forplatedpartsthecoatinghastoberemovedpriorto.measurementbyameansprovennottodamagethesteelortointroducehydrogen.Thistestmethodislimitedto:—carbonandalloysteels,excludingausteniticstainlesssteels(seenote1);—flatspecimenstowhichthecellcanbeattached(seenote2);—measurementsatroomtemperature(25℃±1℃).NOTE1Ifthismethodisusedforausteniticstainlesssteelsandotherfacecentredcubic(FCC)alloys,measurementtimesandinterpretationofresultswillhavetobedeterminedbecauseofthedifferentkineticsinvolved.NOTE2Forslightlycurvedsurfacesitisessentialtodefineanareathatisreproducible.TheareacalculationwillbedifferentfromthatdescribedinthisInternationalStandard.NOTE3Themethodcanbeappliedtosmallparts,however,thisnecessitatessomemodificationofthetechnique,procedureandinterpretationofresults.
【中国标准分类号】:A29
【国际标准分类号】:25_220_40
【页数】:10P;A4
【正文语种】:英语