【英文标准名称】:StandardTestMethodforElectrochemicalCriticalPittingTemperatureTestingofStainlessSteels
【原文标准名称】:电化学临界点蚀温度的标准试验方法
【标准号】:ASTMG150-1999(2004)
【标准状态】:现行
【国别】:
【发布日期】:1999
【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】:G01.11
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:电化学试验;临界点蚀温度;斑蚀;不锈钢
【英文主题词】:criticalpittingtemperature;electrochemicaltest;pittingcorrosion;stainlesssteel
【摘要】:Thistestmethodprovidesapredictionoftheresistancetostablepropagatingpittingcorrosionofstainlesssteelsandrelatedalloysinastandardmedium(seeNote1).TheCPTtestcanbeusedforproductacceptance,alloydevelopmentstudies,andmanufacturingcontrol.Inthecaseofproductacceptance,thesupplierandusermustagreeuponthepreconditioningofthespecimenwithregardtosurfacefinish.Thetestisnotintendedfordesignpurposessincethetestconditionsacceleratecorrosioninamannerthatdoesnotsimulateanyactualserviceenvironment.AnothermethodtodeterminethepotentialindependentCPTwithanelectrochemicaltechniquehasbeendiscussedintheliterature(1-4).Thistestmethodinvolvesapotentiodynamic(potentialsweep)procedureperformedonspecimensatdifferenttemperatures.Acomparison(2)ofthetestmethoddescribedinthistestmethodandthepotentiodynamictechniquehasindicatednodifferenceinthetestresultobtained.1.1Thistestmethodcoversaprocedurefortheevaluationoftheresistanceofstainlesssteelandrelatedalloystopittingcorrosionbasedontheconceptofthedeterminationofapotentialindependentcriticalpittingtemperature(CPT).1.2Thistestmethodsappliestowroughtandcastproductsincludingbutnotrestrictedtoplate,sheet,tubing,bar,forgings,andwelds,(seeNote0).Note0ExamplesofCPTmeasurementsonsheet,plate,tubing,andweldedspecimensforvariousstainlesssteelscanbefoundinRef.().Seetheresearchreport.1.3ThestandardparametersrecommendedinthistestmethodaresuitableforcharacterizingtheCPTofausteniticstainlesssteelsandotherrelatedalloyswithacorrosionresistancerangingfromthatcorrespondingtosolutionannealedUNSS31600(Type316stainlesssteel)tosolutionannealedUNSS31254(6%Mostainlesssteel).1.4ThistestmethodmaybeextendedtostainlesssteelsandotheralloysrelatedtostainlesssteelthathaveaCPToutsidethemeasurementrangegivenbythestandardparametersdescribedinthistestmethod.Appropriatetestpotentialandsolutionmustthenbedetermined.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.1.6hisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A29
【国际标准分类号】:77_140_20
【页数】:13P.;A4
【正文语种】: