ASTM G48-2003(2009) 用氯化铁溶液测定不锈钢及有关合金耐点腐蚀和缝隙腐蚀的标准试验方法
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【英文标准名称】:StandardTestMethodsforPittingandCreviceCorrosionResistanceofStainlessSteelsandRelatedAlloysbyUseofFerricChlorideSolution
【原文标准名称】:用氯化铁溶液测定不锈钢及有关合金耐点腐蚀和缝隙腐蚀的标准试验方法
【标准号】:ASTMG48-2003(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:2003
【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】:G01.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:crevicecorrosion;ferricchloridetestsolution;localizedcorrosion;nickel&x2013;basealloys;pitting;stainlesssteels;Chlorideanalysis--metals/alloys;Crevicecorrosion;Ferricchloridecorrosiontest;Multiplecrevice
【摘要】:Thesetestmethodsdescribelaboratorytestsforcomparingtheresistanceofstainlesssteelsandrelatedalloystotheinitiationofpittingandcrevicecorrosion.Theresultsmaybeusedforrankingalloysinorderofincreasingresistancetopittingandcrevicecorrosioninitiationunderthespecificconditionsofthesemethods.MethodsAandBaredesignedtocausethebreakdownofType304atroomtemperature.Theuseofferricchloridesolutionsisjustifiedbecauseitisrelatedto,butnotthesameas,thatwithinapitorcrevicesiteonaferrousalloyinchloridebearingenvironments(1,2).Thepresenceofaninertcreviceformerofconsistentdimensiononasurfaceisregardedassufficientspecificationofcrevicegeometrytoassessrelativecrevicecorrosionsusceptibility.Therelativeperformanceofalloysinferricchloridesolutiontestshasbeencorrelatedtoperformanceincertainrealenvironments,suchasnaturalseawateratambienttemperature(3)andstronglyoxidizing,lowpH,chloridecontainingenvironments(4),butseveralexceptionshavebeenreported(4-7).MethodsA,B,C,D,E,andFcanbeusedtoranktherelativeresistanceofstainlesssteelsandnickelbasealloystopittingandcrevicecorrosioninchloride-containingenvironments.Nostatementcanbemadeaboutresistanceofalloysinenvironmentsthatdonotcontainchlorides.MethodsA,B,C,D,E,andFweredesignedtoacceleratethetimetoinitiatelocalizedcorrosionrelativetomostnaturalenvironments.Consequently,thedegreeofcorrosiondamagethatoccursduringtestingwillgenerallybegreaterthanthatinnaturalenvironmentsinanysimilartimeperiod.NostatementregardinglocalizedcorrosionpropagationcanbemadebasedontheresultsofMethodsA,B,C,D,EorF.Surfacepreparationcansignificantlyinfluenceresults.Therefore,grindingandpicklingofthespecimenwillmeanthattheresultsmaynotberepresentativeoftheconditionsoftheactualpiecefromwhichthesamplewastaken.Note18212;Grindingorpicklingonstainlesssteelsurfacesmaydestroythepassivelayer.A24-hairpassivationaftergrindingorpicklingissufficienttominimizethesedifferences(8).TheproceduresinMethodsC,D,EandFformeasuringcriticalpittingcorrosiontemperatureandcriticalcrevicecorrosiontemperaturehavenobiasbecausethevaluesaredefinedonlyintermsofthesetestmethods.1.1Thesetestmethodscoverproceduresforthedeterminationoftheresistanceofstainlesssteelsandrelatedalloystopittingandcrevicecorrosion(seeTerminologyG15)whenexposedtooxidizingchlorideenvironments.SixproceduresaredescribedandidentifiedasMethodsA,B,C,D,E,andF.1.1.1MethodA8212;Ferricchloridepittingtest.1.1.2MethodB8212;Ferricchloridecrevicetest.1.1.3MethodC8212;Criticalpittingtemperaturetestfornickel-baseandchromium-bearingalloys.1.1.4MethodD8212;Criticalcrevicetemperaturetestfornickel-baseandchromium-bearingalloys.1.1.5MethodE8212;Criticalpittingtemperaturetestforstainlesssteels.1.1.6MethodF8212;Criticalcrevicetemperaturetestforstainlesssteels.
【原文标准名称】:用氯化铁溶液测定不锈钢及有关合金耐点腐蚀和缝隙腐蚀的标准试验方法
【标准号】:ASTMG48-2003(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:2003
【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】:G01.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:crevicecorrosion;ferricchloridetestsolution;localizedcorrosion;nickel&x2013;basealloys;pitting;stainlesssteels;Chlorideanalysis--metals/alloys;Crevicecorrosion;Ferricchloridecorrosiontest;Multiplecrevice
【摘要】:Thesetestmethodsdescribelaboratorytestsforcomparingtheresistanceofstainlesssteelsandrelatedalloystotheinitiationofpittingandcrevicecorrosion.Theresultsmaybeusedforrankingalloysinorderofincreasingresistancetopittingandcrevicecorrosioninitiationunderthespecificconditionsofthesemethods.MethodsAandBaredesignedtocausethebreakdownofType304atroomtemperature.Theuseofferricchloridesolutionsisjustifiedbecauseitisrelatedto,butnotthesameas,thatwithinapitorcrevicesiteonaferrousalloyinchloridebearingenvironments(1,2).Thepresenceofaninertcreviceformerofconsistentdimensiononasurfaceisregardedassufficientspecificationofcrevicegeometrytoassessrelativecrevicecorrosionsusceptibility.Therelativeperformanceofalloysinferricchloridesolutiontestshasbeencorrelatedtoperformanceincertainrealenvironments,suchasnaturalseawateratambienttemperature(3)andstronglyoxidizing,lowpH,chloridecontainingenvironments(4),butseveralexceptionshavebeenreported(4-7).MethodsA,B,C,D,E,andFcanbeusedtoranktherelativeresistanceofstainlesssteelsandnickelbasealloystopittingandcrevicecorrosioninchloride-containingenvironments.Nostatementcanbemadeaboutresistanceofalloysinenvironmentsthatdonotcontainchlorides.MethodsA,B,C,D,E,andFweredesignedtoacceleratethetimetoinitiatelocalizedcorrosionrelativetomostnaturalenvironments.Consequently,thedegreeofcorrosiondamagethatoccursduringtestingwillgenerallybegreaterthanthatinnaturalenvironmentsinanysimilartimeperiod.NostatementregardinglocalizedcorrosionpropagationcanbemadebasedontheresultsofMethodsA,B,C,D,EorF.Surfacepreparationcansignificantlyinfluenceresults.Therefore,grindingandpicklingofthespecimenwillmeanthattheresultsmaynotberepresentativeoftheconditionsoftheactualpiecefromwhichthesamplewastaken.Note18212;Grindingorpicklingonstainlesssteelsurfacesmaydestroythepassivelayer.A24-hairpassivationaftergrindingorpicklingissufficienttominimizethesedifferences(8).TheproceduresinMethodsC,D,EandFformeasuringcriticalpittingcorrosiontemperatureandcriticalcrevicecorrosiontemperaturehavenobiasbecausethevaluesaredefinedonlyintermsofthesetestmethods.1.1Thesetestmethodscoverproceduresforthedeterminationoftheresistanceofstainlesssteelsandrelatedalloystopittingandcrevicecorrosion(seeTerminologyG15)whenexposedtooxidizingchlorideenvironments.SixproceduresaredescribedandidentifiedasMethodsA,B,C,D,E,andF.1.1.1MethodA8212;Ferricchloridepittingtest.1.1.2MethodB8212;Ferricchloridecrevicetest.1.1.3MethodC8212;Criticalpittingtemperaturetestfornickel-baseandchromium-bearingalloys.1.1.4MethodD8212;Criticalcrevicetemperaturetestfornickel-baseandchromium-bearingalloys.1.1.5MethodE8212;Criticalpittingtemperaturetestforstainlesssteels.1.1.6MethodF8212;Criticalcrevicetemperaturetestforstainlesssteels.
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