Designation:D5179−16(Reapproved2021)StandardTestMethodforMeasuringAdhesionofOrganicCoatingsintheLaboratorybyDirectTensileMethod1ThisstandardisissuedunderthefixeddesignationD5179;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthelaboratorydeterminationoforganiccoatingadhesiontoplasticsubstratesbymountingandremovingametalstudfromthesurfaceofthecoatingandmeasuringtheforcerequiredtobreakthecoating/substratebondwithatensiletester.Thistestmethodmayalsobeappliedtosubstratesotherthanplastic.1.2Thistestmethodrequiresthatthemetalstudbeadhereddirectlytothesurfaceofacoated,curedpanel(Fig.1).1.3Thistestmethodisusedtocomparetheadhesionofcoatingstoplasticorothersubstrates,thusallowingforaquantitativecomparisonofvariouscoating/substratecombina-tionsinlaboratoryconditions.1.4OthertensiletestmethodsareTestMethodsD4541,D7234,D7522,andISO4624(butarenottechnicallyequiva-lent).1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversionstoinch-poundunitsthatareprovidedforinforma-tiononlyandarenotconsideredstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.7Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D4541TestMethodforPull-OffStrengthofCoatingsUsingPortableAdhesionTestersD7234TestMethodforPull-OffAdhesionStrengthofCoat-i...
