【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】:


MIL-STD-2138A (NOTICE 2), MILITARY STANDARD: METAL SPRAYED COATINGS FOR CORROSION PROTECTION ABOARD NAVAL SHIPS (19 FEB 2009) [SUPERSEDING DOD-STD-2138] [S/S BY NAVSEA SI 009-32; SEE NOTICE 2 FOR REPLACEMENT INFORMATION]., MIL-STD-2138A(SH), dated 29 August 1994, is hereby canceled. Users may refer to the alternativecorrosion control method, SI 009-32, 揅leaning and Painting Requirements, Accomplish.擴sers are cautioned to evaluate this document for their particular application before citing it as areplacement document.(Copies of SI 009-32 are available from the NAVSEA Standard Specification for Ship Repair andAlteration Committee website, http://www.sermc.surfor.navy.mil/SSRAC1/standard.htm.)