【英文标准名称】:StandardPracticeforEvaluatingStress-Corrosion-CrackingResistanceofMetalsandAlloysinaBoilingMagnesiumChlorideSolution
【原文标准名称】:评定在沸腾的氯化镁溶液中金属及其合金的抗应力腐蚀断裂
【标准号】:ASTMG36-1994(2006)
【标准状态】:现行
【国别】:
【发布日期】:1994
【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】:G01.06
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:溶液;合金;耐腐蚀性;氯化镁;应力腐蚀;金属;腐蚀;磨损;评定
【英文主题词】:acceleratedtest;apparatus;boilingmagnesiumchloride;glassware;nickelcontainingalloy;stainlesssteels;stress-corrosioncracking
【摘要】:Formostapplications,thisenvironmentprovidesanacceleratedmethodofrankingtherelativedegreeofstress-corrosioncrackingsusceptibilityforstainlesssteelsandrelatedalloysinaqueouschloride-containingenvironments.Materialsthatnormallyprovideacceptableresistanceinhotchlorideservicemaycrackinthistest.Thetestmaynotberelevanttostress-corrosioncrackinginpolythionicacidorcausticenvironments.Resistancetostress-corrosioncrackinginboilingmagnesiumchloride(155.0x00B0;C(311.0x00B0;F))should,wherepossible,becorrelatedtoresistanceinserviceforthematerialsofinterest.However,suchcorrelationsmaynotalwaysbepossible.Boilingmagnesiumchloridemayalsocausepittingofmanystainlessalloys.Thisleadstothepossibilityofconfusingstress-corrosionfailureswithmechanicalfailuresinducedbycorrosion-reducednetcrosssections.Thisdangerisparticularlygreatwhensmallcrosssectionsamples,highappliedstresslevels,longexposureperiods,stress-corrosionresistantalloys,oracombinationthereofarebeingused.Carefulexaminationisrecommendedforcorrectdiagnosisofthecauseoffailure.1.1Thispracticedescribesaprocedureforconductingstress-corrosioncrackingtestsinaboilingmagnesiumchloridesolution.Althoughthistestmaybeperformedusingvariousconcentrationsofmagnesiumchloride,thisprocedurecoversatestsolutionheldataconstantboilingtemperatureof155.01.0176;C(311.01.8176;F).TheboilingpointsofaqueousmagnesiumchloridesolutionsatoneatmospherepressureasafunctionofconcentrationareshowngraphicallyinFig.1.Asuggestedtestapparatuscapableofmaintainingsolutionconcentrationandtemperaturewithintheprescribedlimitsforextendedperiodsoftimeisalsodescribedherein.1.2Theboilingmagnesiumchloridetestisapplicabletowrought,cast,andweldedstainlesssteelsandrelatedalloys.Itisamethodfordetectingtheeffectsofcomposition,heattreatment,surfacefinish,microstructure,andstressonthesusceptibilityofthesematerialstochloridestresscorrosioncracking.1.3Thispracticeisconcernedprimarilywiththetestsolution,whichmaybeusedwithavarietyofstresscorrosiontestspecimens,surfacefinishes,andmethodsofapplyingstress.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SeeSectionforspecificsafetyprecautions.
【中国标准分类号】:H25
【国际标准分类号】:77_060
【页数】:6P.;A4
【正文语种】: