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【英文标准名称】:StandardGuideforMeasurementofThinChromiumCoatingsbySpotTest
【原文标准名称】:用点滴试验法测量薄镀铬层厚度
【标准号】:ASTMB556-1990(2007)
【标准状态】:现行
【国别】:
【发布日期】:1990
【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】:B08.10
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:金属的;金属覆层;测量技术;金属;铬;覆层
【英文主题词】:chromium-coatings;coatingthickness;nickel-electrodeposition;spottest;stainlesssteel;steelproducts-electrodepositedcoatings
【摘要】:Thethicknessofadecorativechromiumcoatingisoftencriticaltoitsperformance.Thisprocedureisusefulforanapproximatedeterminationwhenthebestpossibleaccuracyisnotrequired.Formorereliabledeterminations,thefollowingmethodsareavailable:MethodsB504,B568,andB588.Thistestassumesthattherateofdissolutionofthechromiumbythehydrochloricacidunderthespecifiedconditionsisalwaysthesame.1.1Thisguidecoverstheuseofthespottestforthemeasurementofthicknessesofelectrodepositedchromiumcoatingsovernickelandstainlesssteelwithanaccuracyofabout177;20%(Section9).Itisapplicabletothicknessesupto1.2956;m.Note18212;Althoughthistestcanbeusedforcoatingthicknessesupto1.2956;m,thereisevidencethattheresultsobtainedbythismethodarehighatthicknessesgreaterthan0.5956;m.Inaddition,forcoatingthicknessesabove0.5956;m,itisadvisabletouseadoubledropofacidtopreventdepletionofthetestsolutionbeforecompletionofthetest.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A29
【国际标准分类号】:25_220_40
【页数】:3P.;A4
【正文语种】: