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【英文标准名称】:StandardTestMethodforMeasurementofCoatingThicknessesbytheMagneticMethod:ElectrodepositedNickelCoatingsonMagneticandNonmagneticSubstrates
【原文标准名称】:用磁性法测量磁性和非磁性基底上的电解沉积镀镍层厚度的标准试验方法
【标准号】:ASTMB530-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:(TestMethod)
【标准水平】:()
【中文主题词】:覆层厚度
【英文主题词】:coatingthickness;magneticmethod;nickelcoatings;nondestructivethickness;thickness;thicknesstesting;Magneticmaterials/applications;Magnetictesting--coatingthickness;Nickelcoatings;Nondestructiveevaluation(NDE)--metallic/inorganiccoa
【摘要】:Thethicknessofacoatingisoftencriticaltoitsperformance.Thismagneticmethodissuitableformeasuringnondestructivelythethicknessofsomenickelcoatingsandforspecificationacceptance.Thismethodrequiresthatthemagneticpropertiesofthecoatinganditssubstratebethesameasthoseofthereferencestandardsusedforthecalibrationadjustmentoftheinstrument.5.3Thismethodshouldnotbeusedtodeterminethethicknessofautocatalyticallydepositednickel-phosphorusalloyscontainingmorethan8%phosphorusonsteel.ThosecoatingsaresufficientlynonmagneticforTestMethodB499tobesuitableforthatdetermination,aslongasthemeasurementismadepriortoanyheattreatment.1.1Thistestmethodcoverstheuseofmagneticinstrumentsforthenondestructivemeasurementofthethicknessofanelectrodepositednickelcoatingoneitheramagneticornonmagneticsubstrate.Itisintendedtosupplementmanufacturersx2019;instructionsfortheoperationoftheinstrumentsandisnotintendedtoreplacethem.1.2Theseinstrumentsmeasureeitherthemagneticattractionbetweenamagnetandthecoating-substratecombination(categorizedasx201C;magneticpull-offx201D;),orthechangeinmagneticfluxdensitywithintheprobe(categorizedasx201C;electronicx201D;).1.3Forthistestmethod,therearetwotypesofcoating-substratecombinationsthatcanbeencountered:TypeA,nickelcoatingsonamagneticsubstrate,andTypeB,nickelcoatingsonanonmagneticsubstrate.1.4Theeffectivemeasuringrangesofinstrumentsusingtheprincipleofmagneticattractionareupto50x03BC;m(2mils)forTypeAcoatings,andupto25x03BC;m(1mil)forTypeBcoatings.Forgagesbasedonchangeinmagneticfluxdensityprinciples,theeffectiverangesaremuchgreater,andmeasurementsupto1mm(40mils)ormore,canbemadeonbothtypesofcoatings.1.5MeasurementsmadeinaccordancewiththistestmethodwillbeincompliancewiththerequirementsofISOStandard2361asprintedin1982.1.6ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A29
【国际标准分类号】:25_220_40
【页数】:5P.;A4
【正文语种】:英语