【英文标准名称】:StandardPracticeforQualitativeAdhesionTestingofMetallicCoatings
【原文标准名称】:金属覆层粘附性定性试验的标准实施规程
【标准号】:ASTMB571-1997(2008)e1
【标准状态】:现行
【国别】:美国
【发布日期】:1997
【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】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:adhesion;metalliccoatings;Adhesion--coatings;Bendtesting--coatings;Burnishingtest--forcoatingadhesion;Filetest--coatingadhesion;Heatingtests--metals;Chisel-knifetest;Coatingadhesion;Drawtest;Grind-sawtest;Impactresistance;Metallic
【摘要】:Thesetestsareusefulforproductioncontrolandforacceptancetestingofproducts.Interpretingtheresultsofqualitativemethodsfordeterminingtheadhesionofmetalliccoatingsisoftenacontroversialsubject.Ifmorethanonetestisused,failuretopassanyonetestisconsideredunsatisfactory.Inmanyinstances,theenduseofthecoatedarticleoritsmethodoffabricationwillsuggestthetechniquethatbestrepresentsfunctionalrequirements.Forexample,anarticlethatistobesubsequentlyformedwouldsuggestadraworabendtest;anarticlethatistobesolderedorotherwiseexposedtoheatwouldsuggestaheat-quenchtest.Ifapartrequiresbakingorheattreatingafterplating,adhesiontestsshouldbecarriedoutaftersuchposttreatmentaswell.Severalofthetestsarelimitedtospecifictypesofcoatings,thicknessranges,ductilities,orcompositionsofthesubstrate.TheselimitationsarenotedgenerallyinthetestdescriptionsandaresummarizedinTable1forcertainmetalliccoatings.x201C;Perfectx201D;adhesionexistsifthebondingbetweenthecoatingandthesubstrateisgreaterthanthecohesivestrengthofeither.Suchadhesionisusuallyobtainedifgoodelectroplatingpracticesarefollowed.Formanypurposes,theadhesiontesthastheobjectiveofdetectinganyadhesionlessthanx201C;perfect.x201D;Forsuchatest,oneusesanymeansavailabletoattempttoseparatethecoatingfromthesubstrate.Thismaybeprying,hammering,bending,beating,heating,sawing,grinding,pulling,scribing,chiseling,oracombinationofsuchtreatments.Ifthecoatingpeels,flakes,orliftsfromthesubstrate,theadhesionislessthanperfect.Ifevaluationofadhesionisrequired,itmaybedesirabletouseoneormoreofthefollowingtests.Thesetestshavevaryingdegreesofseverity;andonemightservetodistinguishbetweensatisfactoryandunsatisfactoryadhesioninaspecificapplication.Thechoiceforeachsituationmustbedetermined.Whenthisguidelineisusedforacceptanceinspection,themethodormethodstobeusedmustbespecified.Becausetheresultsoftestsincasesofmarginaladhesionaresubjecttointerpretation,agreementshallbereachedonwhatisacceptable.Ifthesizeandshapeoftheitemtobetestedprecludesuseofthedesignatedtest,equivalenttestpanelsmaybeappropriate.Ifpermitted,testpanelsshallbeofthesamematerialandhavethesamesurfacefinishastheitemtobetestedandshallbeprocessedthroughthesamepreplating,electroplating,andpostplatingcyclewiththepartstheyrepresent.1.1Thispracticecoverssimple,qualitativetestsforevaluatingtheadhesionofmetalliccoatingsonvarioussubstances.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A29
【国际标准分类号】:25_220_40
【页数】:4P.;A4
【正文语种】:英语