Designation:D6944−15(Reapproved2020)StandardPracticeforDeterminingtheResistanceofCuredCoatingstoThermalCycling1ThisstandardisissuedunderthefixeddesignationD6944;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticedeterminestheresistanceofcuredcoatingsorcoatingsystemstorepeatedthermalcyclesandisdesignedtoassesstheeffectofthermalcyclingonthepropertiesofacoatingorcoatingsystem.Thesepropertiesmayincludeadhesion,resistancetochecking,cracking,blistering,orothers.Thisprocedureisnotintendedtoprovideaquantitativemeasureoftheservicelifethatcanbeexpectedfromaspecificcoatingsystemonagivensubstrate.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.3Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D660TestMethodforEvaluatingDegreeofCheckingofExteriorPaintsD661TestMethodforEvaluatingDegreeofCrackingofExteriorPaintsD714TestMethodforEvaluatingDegreeofBlisteringofPaintsD3359TestMethodsforRatingAdhesionbyTapeTestD4541TestMethodforPull-OffStrengthofCoatingsUsingPortableAdhesionTestersD6132TestMethodforNondestructiveMeasurementofDryFilmThicknessofAppliedOrganicCoatingsUsinganUltrasonicCoatingThicknessGageD6677TestMethodforEvaluatingAdhesionbyKnifeD7091PracticeforNondestructiveMeasurementofDryFilmThicknessofNonmagneticCoatingsAppliedtoFerrousMetalsandNonmagnetic,NonconductiveCoat-ingsAppli...
