【astm標(biāo)準(zhǔn)】d 6132 - 13

1、Designation:D6132?13StardTestMethodfNondestructiveMeasurementofDryFilmThicknessofAppliedganicCoatingsUsinganUltrasonicCoatingThicknessGage1ThisstardisissuedunderthefixeddesignationD6132thenumberimmediatelyfollowingthedes

2、ignationindicatestheyearofiginaladoptioninthecaseofrevisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thiste

3、stmethoddescribestheuseofultrasonicfilmthicknessgagestomeasureaccuratelynondestructivelythedryfilmthicknessofganiccoatingsappliedoverasubstrateofdissimilarmaterial.Measurementsmaybemadeonfieldstructuresoncommerciallymanu

4、facturedproductsonlabatytestspecimens.Thesetypesofgagescanaccuratelymeasurethedryfilmthicknessofganiccoatingsonavarietyofsubstratessuchasconcretewoodwallboardplasticfibercompositesmetal.1.2Thistestmethodisnotapplicableto

5、coatingsthatwillbereadilydefmableunderloadofthemeasuringinstrumentastheinstrumentprobeisplaceddirectlyonthecoatingsurfacetotakeareading.1.3Theeffectiverangeofinstrumentsusingtheprincipleofultrasonicsislimitedbygagedesign

6、.Athicknessrangeof8mto7.60mm(0.3to300mils)hasbeendemonstrated.1.4ThevaluesstatedinSIunitsaretoberegardedasstard.Nootherunitsofmeasurementareincludedinthisstard.1.5Thisstarddoesnotpurpttoaddressthesafetyconcernsifanyassoc

7、iatedwithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappropriatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.2.ReferencedDocuments2.1ASTMStards:2D823PracticesfProducingFilmso

8、fUnifmThicknessofPaintVarnishRelatedProductsonTestPanelsD1005TestMethodfMeasurementofDryFilmThicknessofganicCoatingsUsingMicrometersD4138PracticesfMeasurementofDryFilmThicknessofProtectiveCoatingSystemsbyDestructiveCross

9、SectioningMeansE177PracticefUseoftheTermsPrecisionBiasinASTMTestMethodsE691PracticefConductinganInterlabatyStudytoDeterminethePrecisionofaTestMethod2.2SSPC—TheSocietyfProtectiveCoatingsStards:3PA2ProcedurefDeterminingCon

10、fmancetoDryCoatingThicknessRequirementsPA9MeasurementofDryganicCoatingThicknessonCementitiousSubstratesUsingUltrasonicGages2.3ASME—TheAmericanSocietyofMechanicalEngineers:4B46.1SurfaceTexture(SurfaceRoughnessWavinessLay)

11、3.Terminology3.1DefinitionsofTermsSpecifictoThisStard:3.1.1accuracyn—themeasureofthemagnitudeoferrbetweentheresultofameasurementthetruethicknessoftheitembeingmeasured.3.1.1.1Discussion—Anaccuracystatementpredictstheabili

12、tyofacoatingthicknessgagetomeasurethetruethicknessofacoatingtobemeasured.Accuracystatementsprovidetheperfmancecapabilityacrossthefullfunctionalmeasurementrangeofthegage.Accuracystatementsfrequentlyincludeafixedptionthatr

13、emainsconstantacrossthemeasurementrangeplusavariableptionthatisrelatedtothemeasurementresultfaparticularthickness.3.1.2adjustmentn—thephysicalactofaligningagage’sthicknessreadingstomatchthoseofaknownthicknesssample(remov

14、alofbias)indertoimprovetheaccuracyofthegageonaspecificcoating.1ThistestmethodisunderthejurisdictionofASTMCommitteeD01onPaintRelatedCoatingsMaterialsApplicationsisthedirectresponsibilityofSubcommitteeD01.23onPhysicalPrope

15、rtiesofAppliedPaintFilms.CurrenteditionapprovedNov.12013.PublishedDecember2013.iginallyapprovedin1997.Lastpreviouslyeditionapprovedin2008asD6132–08.DOI:10.1520D613213.2FreferencedASTMstardsvisittheASTMwebsitewww.astm.gco

16、ntactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageontheASTMwebsite.3AvailablefromSocietyfProtectiveCoatings(SSPC)4024thSt.6thFloPittsburghPA152224656:www.sspc.g.4Availab

17、lefromAmericanSocietyofMechanicalEngineers(ASME)ASMEInternationalHeadquartersThreeParkAve.NewYkNY100165990:www.asme.g.ASummaryofChangessectionappearsattheendofthisstardCopyright?ASTMInternational100BarrHarbDrivePOBoxC700

18、WestConshohockenPA194282959.UnitedStates1isnonhomogeneous.Verifyoperationonaknownthicknessofthecoatingsubstratecombinationifthesecircumstancesarethoughttoexist.5.5Multilayeredcoatingshavemanyinterfacestheinstrumentwillme

19、asuretotheinterfaceseparatingthetwomostacousticallydifferentmaterials.Someinstrumentshavetheabilitytodetectmeasuretheindividuallayerthicknessesinamultilayersystem.5.6Theuseofthistestmethodisnotnecessarilylimitedbythetype

20、ofsubstratematerial.6.Apparatus6.1GageBody—anelectronicinstrumentthatutilizestransducerprobes.6.2TransducerProbe—ameasurementprobe(sens)usinganultrasonicprinciplenumericaltechniquesattachedtothegagebody.Theappropriatetra

21、nsducerprobeisedbasedontheanticipatedganiccoatingdryfilmthickness.Thegagemanufacturermaybecontactedfarecommendation.7.TestSpecimen7.1Whenthistestmethodisusedinthefieldthespecimenisthecoatedstructurearticleonwhichthedryfi

22、lmthicknessistobeevaluated.7.2Flabatyuseapplythematerialstobetestedtopanelsofthesamecompositionstructurearticleonwhichthedryfilmthicknessistobeevaluated.Curetheganiccoatinginaccdancewiththecoatingmanufacturer’sinstructio

23、n.NOTE2—CoatingsshouldbeappliedinaccdancewithPracticesD823asagreeduponbetweenthepurchasertheseller.8.CalibrationVerificationAdjustmentofApparatus8.1Calibrationofcoatingthicknessgagesisperfmedbytheequipmentmanufacturerthe

24、irauthizedagentbyanaccreditedcalibrationlabatyinacontrolledenvironmentusingadocumentedprocess.AcertificateofcalibrationshowingtraceabilitytoaNationalMetrologyInstitutecanbeissued.Thereisnostardtimeintervalfrecalibrationn

25、isoneabsolutelyrequiredbutacalibrationintervalcanbeestablishedbasedonexperiencethewkenvironment.Aoneyearcalibrationintervalisatypicalfrequencysuggestedbymanygagemanufacturers.8.2VerificationofAccuracy—Befeuseeachinstrume

26、nt’scalibrationaccuracyshallbeverifiedbytheuserinaccdancewiththeinstructionsofthemanufactureremployingsuitablecoatingthicknessstardsifnecessaryanydeficienciesfoundshallbecrected.Theprobeshouldalsobeexaminedfcleanlinessex

27、cessivewearbefeverifyingtheaccuracybefeobtainingcoatingthicknessmeasurements.8.2.1Ifgagereadingsobtainedduringverificationareoutsidethecombinedaccuracyofthecoatingthicknessstandardthemanufacturer’sstatedgageaccuracythega

28、geshouldbereturnedtothemanufacturertheirauthizedagentfcalibration.8.3Adjustment—Measurementaccuracydirectlycrespondstothesoundvelocityofthecoatingbeingmeasured.Becauseultrasonicinstrumentsmeasurethetransittimeofanultraso

29、nicpulsetheymayrequireanadjustmentbytheuserfeachcoatingmaterial.Todetermineifanadjustmentisnecessarytheusershouldmeasureaknownthicknessofthecoating(referencestard)asdeterminedby:8.3.1Usingadestructivecrosssectioningmetho

30、dsuchasdescribedinPracticeD41388.3.2Nondestructively(thatisnotdestroyingfilmintegrity)removingmeasuringthecoatingwithamicrometerinaccdancewithTestMethodD10058.3.3Crosssectioningtheproductmeasuringthecoatingthicknessbyima

31、gingthecoatingcrosssectionunderamicroscopebyusingcomputerizedimageanalysis.Inthecaseofvariablecoatingthicknesscoatingsappliedtoroughsubstratesurfacestheaveragecoatingthicknessshouldbecalculatedbycomputerimageanalysis.8.4

32、Bestadjustmentresultsareachievedoncoatingswithathicknessequaltogreaterthanthecoatingthicknessrangetobemeasuredoncoatingmaterialhavingthesameacousticvelocityattenuationasthecoatingtobemeasured.Followthemanufacturer’sinstr

33、uctions.NOTE3—Ithasbeenreptedthatthephysicalpropertiesofsomecoatingssuchasacrylicmelaminecanvaryoverthetimeofthecure.9.Procedure9.1UsetheinstrumentonlyaftercalibrationhasbeenverifiedinaccdancewithSection8.9.2Ensurethatth

34、ecoatingisproperlycuredpritouseoftheinstrument.9.3Acouplantisoftenrequiredtotransmittheultrasonicpulsefromthegage’sprobeintothecoating.Waterisidealfcoatingswithasmoothsurface.Fcoatingswitharoughsurfaceapropyleneglycolgel

35、couplantisbestprovidingitisnotacontaminantfthecoatingtobemeasured.Othercouplantssuchasliquidwallpaperpasteoiletc.maybeused.Undercertainconditionsfexampleifthecoatingissofttheprobemayfunctionwithoutacouplant.Fspecificinfm

36、ationregardingtheuseofcouplantsrefertothegagemanufacturer’sinstructions.9.4Placetheinstrument’sprobeflatonthesurfaceapplyconstantpressure.Holdtheprobesteadyduringthemeasurement.9.5Takeasufficientnumberofreadingstomeasure

37、thecoatingthicknesswithrequiredstatisticalaccuracy.NOTE4—SSPCPA2specifiesthelocationnumberofreadingsneededtoacterizeacoatedmetalsurfaceSSPCPA9specifiesthelocationnumberofreadingsneededtoacterizeacoatedcementitioussurface