ASTM D7091-2005 应用于黑色金属的无磁涂层和应用于有色金属的无磁和不导电涂层的干膜厚度的无损测量的标准实施规程

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【英文标准名称】:StandardPracticeforNondestructiveMeasurementofDryFilmThicknessofNonmagneticCoatingsAppliedtoFerrousMetalsandNonmagnetic,NonconductiveCoatingsAppliedtoNon-FerrousMetals
【原文标准名称】:应用于黑色金属的无磁涂层和应用于有色金属的无磁和不导电涂层的干膜厚度的无损测量的标准实施规程
【标准号】:ASTMD7091-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:D01.23
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:表面性质;非磁性;尺寸计量;无损;角度测量;厚度;线性测量;有色金属;计量学;测量;干膜;黑色金属;覆层;有色
【英文主题词】:coatingthickness;dryfilmthickness;eddycurrentthicknessgages;magneticgages;nondestructivethickness;paintthickness
【摘要】:Mostspecificationsforcommercialandindustrialcoatingsprojectsstipulateaminimumandamaximumdryfilmthicknessforeachlayerinacoatingsystem.Additionally,mostmanufacturersofhighperformancecoatingswillwarrantycoatingsystemsbasedupon,inpart,achievingtheproperthicknessofeachlayerandthetotalcoatingsystem.Evenifaprojectspecificationisnotprovided,thecoatingmanufacturerx2019;srecommendationspublishedonproductdatasheetscanbecomethegoverningdocument(s).Equipmentmanufacturersproducenon-destructivecoatingthicknesstestinggagesthatareusedtomeasurethecumulativethicknessofthecoatinglayers,aftertheyaredry.Themanufacturersprovideinformationfortheadjustmentanduseofthesegages,normallyintheformofoperatinginstructions.Theuserofthisequipmentmustbeknowledgeableintheproperoperationofthesedevices,includingmethodsforverifyingtheaccuracyoftheequipmentpriorto,duringandafteruseaswellasmeasurementprocedures.Thispracticewaspreparedtodescribethepropermethodsforverifyingtheaccuracyofcoatingthicknessmeasuringgages,aswellasthepropermethodsforobtainingcoatingthicknessmeasurementsonbothferrousandnon-ferrousmetalsubstrates.1.1Thispracticedescribesthenondestructivemeasurementofthedryfilmthicknessofnonmagneticcoatingsappliedtothesurfaceofferrousmetalsusingmagneticgagesandthenondestructivemeasurementofthedryfilmthicknessofelectricallynonconductive,nonmagneticcoatingsappliedtothesurfaceofnonferrousmetalsusingeddycurrentgages.Thispracticeisintendedtosupplementthemanufacturers''instructionsforthemanualoperationofthegagesandisnotintendedtoreplacethem.Itincludesdefinitionsofkeyterms,referencedocuments,thesignificanceanduseofthepractice,theadvantagesandlimitationsofcoatingthicknessgages,andadescriptionoftestspecimens.Itdescribesthemethodsandrecommendedfrequencyforverifyingtheaccuracyofgagesandforadjusting(optimizing)theequipment,describesafrequencyformeasuringthethicknessofthecoating(s)andliststhereportingrecommendations.1.2Theseproceduresarenotapplicabletocoatingsthatwillbereadilydeformedundertheloadofthemeasuringgages/probes,asthegageprobemustbeplaceddirectlyonthecoatingsurfacetoobtainareading.Provisionsformeasuringonsoftortackycoatingsaredescribedin.1.3Useoffilmthicknessmeasuringgagesonmetal-filledcoatingsmayproduceerroneousresults,dependingonthetypeandamountofmetalinthecoatingfilm.Theusershouldconsultthemanufacturersinstructionsregardingtheuseofcoatingthicknessgagesonthesetypesofcoatings.1.4Coatingthicknesscanbemeasuredusingavarietyofgages.Thesegagesarecategorizedas"magneticpull-off"and"electronic."Theyuseasensingprobeormagnettomeasurethegap(distance)betweenthebasemetalandtheprobe.Thismeasureddistanceisdisplayedascoatingthicknessbythegages.Accordingly,thesegagescannotdistinguishthethicknessofindividuallayersaftertheyhaveallbeenapplied.Thethicknessofeachlayermustbemeasuredafteritisapplied.Eventhen,thethicknessofthemeasuredlayeristhecumulativethicknessofthatlayerandalllayersbeneathit,downtothebasemetal.1.5Gageswhichmeasurecoatingthicknessusinganultrasonicprinciplemayalsobeabletomeasurethethicknessofcoatingsappliedtometalsurfaces.Thispracticedoesnotaddresstheuseofultrasoniccoatingthicknessgages.TestMethodD6132shouldbereferencedforthisapplication.1.6Coatingthicknesscanvarywidelyacrossasurface.Asaresult,obtainingsingle-pointmeasurementsmaynotaccuratelyrepresenttheactualcoatingsyste......
【中国标准分类号】:A29
【国际标准分类号】:17_040_20
【页数】:7P.;A4
【正文语种】: