ASTM B858-2006 用氨蒸气试验测定铜合金对应力腐蚀裂纹敏感度的标准试验方法

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【英文标准名称】:StandardTestMethodforAmmoniaVaporTestforDeterminingSusceptibilitytoStressCorrosionCrackinginCopperAlloys
【原文标准名称】:用氨蒸气试验测定铜合金对应力腐蚀裂纹敏感度的标准试验方法
【标准号】:ASTMB858-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:B05.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:氨;铜合金;裂开;测定;敏感性测定;应力腐蚀;灵敏性;试验方法
【英文主题词】:ammoniatest;copperalloys;residualstress;stresscorrosion
【摘要】:Thistestmethodisanacceleratedtesttodetermineifacopperalloyproductwillbesusceptibletostress-corrosioncrackingwhenexposedtoaparticularatmosphericconditionduringservicewiththeappropriaterisklevelx2014;seeAnnexA1.5.1.1Thistestmethodisgenerallyintendedtodetermineifacopperalloyproductwillcrackbecauseofinternalstresseswhensubjectedtothetest,andisnotintendedfortestingassembliesunderappliedstress.Ifusedforthispurpose,itshallbeforinformationonlyandnotacauseforrejectionoftheassembly,itscomponentparts,ortheoriginalmillproduct.1.1Thistestmethoddescribesaproceduretodeterminethepresenceofresidualstressesinwroughtcopperalloyproductsthatmayleadtostresscorrosioncracking.Anammoniavaporatmosphereisusedasanacceleratedtest.1.2Thistestmethodisonlysuitableforproductsfabricatedfromcopperalloysthatareknowntobesusceptibletostresscorrosioncrackinginammoniavaporatmospheres.Itisintendedtocreateanenvironmentalconditionofreproducibleseverity.Note1Itiswellknownthatthecriticalstepinthecrackingmechanismisthedevelopmentofanenvironmentinthecondensatefilmthatoccursonthesurfaceofthetestspecimen,andisrichincoppercomplexions.1.3TheseverityofthistestmethoddependsuponthepHofthecorrosivesolution.Inaregivenfourdifferentatmospherestowhichtheproductmaybeexposed,andtheappropriatepHofthesolutiontobeusedforthetest,dependingontherisklevelassociatedwiththeintendedapplication.1.3.1TheappropriatepHvalueforthetestshallbespecifiedintheproductspecification,orasperestablishedagreementbetweenthesupplierandpurchaser,withrespecttothealloyanditsintendedapplication.1.4UnitsThevaluesstatedinSIunitsaretoberegardedasthestandard.Nootherunitsofmeasurementareincludedinthisstandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H25
【国际标准分类号】:77_120_30
【页数】:4P.;A4
【正文语种】: