ASTM F326-1996(2006) 电镀镉工艺氢度化电子测量的标准试验方法

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【英文标准名称】:StandardTestMethodforElectronicMeasurementforHydrogenEmbrittlementFromCadmium-ElectroplatingProcesses
【原文标准名称】:电镀镉工艺氢度化电子测量的标准试验方法
【标准号】:ASTMF326-1996(2006)
【标准状态】:现行
【国别】:
【发布日期】:1996
【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】:F07.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:氢脆;镉;金属覆层;电镀;金属的;航天技术;覆层;金属膜;试验;航空航天运输;金属;材料
【英文主题词】:cadmium;hydrogendetectioninstrument;hydrogenembrittlement
【摘要】:Hydrogenisevolvedduringmetalelectrodepositioninaqueousbaths.Someofthishydrogenenterspartsduringplating.Iftheabsorbedhydrogenisatalevelpresentingembrittlementhazardstohigh-strengthsteel,itisremovedbybakingpartsafterplatingtoexpelthishydrogen.However,thelackofplateporosityitselfmayblockhydrogenegress.Thus,itbecomesimportanttoknowboththerelativeamountofhydrogenabsorbedandtheplateporosity.Thistestprovidesaquantitativecontrolnumberforcadmiumplateporositythatcanbeusedtocontrolacadmiumplatingprocessandthestatusofcadmium-platedhardware.Itcanalsobeusedforplatingprocesstroubleshootingandresearchanddevelopmenttodeterminetheeffectsonplateporositybyprocessvariables,contaminants,andmaterials.Whenusedtocontrolacriticalprocess,controlnumbersforplateporositymustbedeterminedbycorrelationwithstressrupturespecimensorotheracceptablestandards.Thereisnoprimestandardforplateporosity.Forthisreason,twoovensmustbeused,withtestsalternatedbetweenovens.Datafromtheovensarecomparedtoensurenoequipmentchangehasoccurred.1.1Thistestmethodcoversanelectronichydrogendetectioninstrumentprocedureformeasurementofplatingpermeabilitytohydrogen.Thismethodmeasuresavariablerelatedtohydrogenabsorbedbysteelduringplatingandtothehydrogenpermeabilityoftheplateduringpostplatebaking.Aspecificapplicationofthismethodiscontrollingcadmium-platingprocessesinwhichtheplateporosityrelativetohydrogeniscritical,suchascadmiumonhigh-strengthsteel.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatement,seeSection8.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.
【中国标准分类号】:A29
【国际标准分类号】:25_220_40
【页数】:8P.;A4
【正文语种】: