ASTM A262-2010 探测奥氏体不锈钢晶间腐蚀敏感度的标准实施规程

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【英文标准名称】:StandardPracticesforDetectingSusceptibilitytoIntergranularAttackinAusteniticStainlessSteels
【原文标准名称】:探测奥氏体不锈钢晶间腐蚀敏感度的标准实施规程
【标准号】:ASTMA262-2010
【标准状态】:现行
【国别】:
【发布日期】:2010
【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】:A01.14
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:奥氏体不锈钢;硫酸铜;腐蚀检验;腐蚀剂结构;硫酸铁;粒间腐蚀;硝酸;草酸;奥氏体不锈钢铸件;分类;铜-硫酸铜-硫酸试验;缺口钢;沟渠结构;端面晶粒点蚀;硫酸铁-硫酸试验;晶粒凹点;枝晶间沟渠;晶间腐蚀(IGA);金相结构;金属/合金微观组织检查;硝酸/氢氟酸试验;草酸浸蚀试验;样品制备(试验用);不锈钢(腐蚀试验);梯级结构;钢结构分析/应用;灵敏性;钢外观检查;焊接钢材料/应用
【英文主题词】:austeniticstainlesssteel;coppersulfate;corrosiontesting;etchstructures;ferricsulfate;intergranularcorrosion;nitricacid;oxalicacid;Austeniticstainlesssteelcastings;Classification;Copper-coppersulfate-sulfuricacidtest;Discontinuiti
【摘要】:1.1Thesepracticescoverthefollowingfivetests:1.1.1PracticeA8212;OxalicAcidEtchTestforClassificationofEtchStructuresofAusteniticStainlessSteels(Sections3to7,inclusive),1.1.2PracticeB8212;FerricSulfatex2013;SulfuricAcidTestforDetectingSusceptibilitytoIntergranularAttackinAusteniticStainlessSteels(Sections8to14,inclusive),1.1.3PracticeC8212;NitricAcidTestforDetectingSusceptibilitytoIntergranularAttackinAusteniticStainlessSteels(Sections15to21,inclusive),1.1.4PracticeE8212;Copperx2013;CopperSulfatex2013;SulfuricAcidTestforDetectingSusceptibilitytoIntergranularAttackinAusteniticStainlessSteels(Sections22to31,inclusive),and1.1.5PracticeF8212;Copperx2013;CopperSulfatex2013;50%SulfuricAcidTestforDetectingSusceptibilitytoIntergranularAttackinMolybdenum-BearingAusteniticStainlessSteels(Sections32to38,inclusive).1.2Thefollowingfactorsgoverntheapplicationofthesepractices:1.2.1Susceptibilitytointergranularattackassociatedwiththeprecipitationofchromiumcarbidesisreadilydetectedinallsixtests.1.2.2Sigmaphaseinwroughtchromium-nickel-molybdenumsteels,whichmayormaynotbevisibleinthemicrostructure,canresultinhighcorrosionratesonlyinnitricacid.1.2.3Sigmaphaseintitaniumorcolumbiumstabilizedalloysandcastmolybdenum-bearingstainlessalloys,whichmayormaynotbevisibleinthemicrostructure,canresultinhighcorrosionratesinboththenitricacidandferricsulfate-sulfuricacidsolutions.1.3Theoxalicacidetchtestisarapidmethodofidentifying,bysimpleetching,thosespecimensofcertainstainlesssteelgradesthatareessentiallyfreeofsusceptibilitytointergranularattackassociatedwithchromiumcarbideprecipitates.Thesespecimenswillhavelowcorrosionratesincertaincorrosiontestsandthereforecanbeeliminated(screened)fromtestingasx201C;acceptable.x201D;1.4Theferricsulfatex2013;sulfuricacidtest,thecopperx2013;coppersulfatex2013;50%sulfuricacidtest,andthenitricacidtestarebasedonweightlossdeterminationsand,thus,provideaquantitativemeasureoftherelativeperformanceofspecimensevaluated.Incontrast,thecopperx2013;coppersulfatex2013;16%sulfuricacidtestisbasedonvisualexaminationofbendspecimensand,therefore,classifiesthespecimensonlyasacceptableornonacceptable.1.5Inmostcaseseitherthe15-hcopperx2013;coppersulfatex2013;16%sulfuricacidtestorthe120-hferricsulfatex2013;sulfuricacidtest,combinedwiththeoxalicacidetchtest,willprovidetherequiredinformationintheshortesttime.Allstainlessgradeslistedintheaccompanyingtablemaybeevaluatedinthesecombinationsofscreeningandcorrosiontests,exceptthosespecimensofmolybdenum-bearinggrades(forexample316,316L,317,and317L),whi......
【中国标准分类号】:H25
【国际标准分类号】:77_140_20
【页数】:16P.;A4
【正文语种】: