Designation:D912–81(Reapproved1999)StandardSpecificationforCuprousOxideforUseinAntifoulingPaints1ThisstandardisissuedunderthefixeddesignationD912;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thisspecificationcoverscuprousoxideforuseinantifoulingpaints.2.ReferencedDocuments2.1ASTMStandards:D185TestMethodsforCoarseParticlesinPigments,Pastes,andPaints2D283TestMethodsforChemicalAnalysisofCuprousOxideandCopperPigments23.Composition3.1Thepigmentshallconsistessentiallyoffinelydividedcuprousoxideandshallconformtothefollowingrequire-ments:Cuprousoxide,min,%97Totalcopper,calculatedasCu,min,%86TotalreducingpowerasCu2O,min,%97Metalsotherthancopper,max,%0.5Combinedchlorides,calculatedasCl,andsulfates,calculatedasSO4,max,%0.5Acetone-solublematter,max,%0.5Stability:decreaseintotalreducingpowerafterstabilitytest,max,%2.0Coarseparticles(totalresidueretainedonaNo.325(45-µm)sieve),max,%0.5TotalnitricacidinsolubleresidueonaNo.200(75-µm)sieve,max,%0.14.Sampling4.1Twosamplesshallbetakenatrandomfromdifferentpackagesfromeachlot,batch,day’spack,orotherunitofproductioninashipment.Whennomarkingsdistinguishingbetweenunitsofproductionappear,samplesshallbetakenfromdifferentpackagesintheratiooftwosamplesforeach10000lb(5000kg),exceptthatforshipmentsoflessthan10000lbtwosamplesshallbetaken.Attheoptionofthepurchaser,thesamplesmaybetestedseparatelyorafterblendinginequalquantitiesthesamplesfromthesameproductionunittoformacompositesample.5.TestMethods5.1Testsshallbeconductedinaccordancewiththefollow-ingASTMtestmethods.TestproceduresnotcoveredbyASTMtestmethodsshallbemutuallyagreeduponbetweenthepurchaserandtheseller.5.2CoarseParticles—TestMethodsD185.5.3CuprousOxideContent,TotalCopper,ReducingPower,OtherMetals,Chl...
