Designation:D4939−89(Reapproved2020)StandardTestMethodforSubjectingMarineAntifoulingCoatingtoBiofoulingandFluidShearForcesinNaturalSeawater1ThisstandardisissuedunderthefixeddesignationD4939;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofantifoulingperformanceandreductionofthicknessofmarineantifouling(AF)coatingsbyerosionorablation(seeSection3)underspecifiedconditionsofhydrodynamicshearstressinseawateralternatedwithstaticexposureinseawater.Anantifoulingcoatingsystemofknownperformanceisincludedtoserveasacontrolinantifoulingstudies.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Foraspecifichazardsstatement,seeSection8.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2A569/A569MSpecificationforSteel,Carbon(0.15Maximum,Percent),Hot-RolledSheetandStripCommer-cial(Withdrawn2000)3D1186TestMethodsforNondestructiveMeasurementofDryFilmThicknessofNonmagneticCoatingsAppliedtoaFerrousBase(Withdrawn2006)3D2200PracticeforUseofPictorialSurfacePreparationStandardsandGuidesforPaintingSteelSurfacesD3623TestMethodforTestingAntifoulingPanelsinShal-lowSubmergence2.2U.S.MilitarySpecifications:4MIL-P-24441Primer,Epoxy(Formula150,FormulaSheet24441/1)MIL-P-1...
