Designation:D4048−19aStandardTestMethodforDetectionofCopperCorrosionfromLubricatingGrease1ThisstandardisissuedunderthefixeddesignationD4048;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thistestmethodcoversthedetectionofthecorrosive-nesstocopperoflubricatinggrease.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesafterSIunitsareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Forspecificwarningstatements,seeSections7,8,and10.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D97TestMethodforPourPointofPetroleumProductsD130TestMethodforCorrosivenesstoCopperfromPetro-leumProductsbyCopperStripTestD2500TestMethodforCloudPointofPetroleumProductsandLiquidFuelsD4175TerminologyRelatingtoPetroleumProducts,LiquidFuels,andLubricants2.2ASTMAdjuncts:CopperStripCorrosionStandard33.Terminology3.1Definitions—SeeTerminologyD4175.3.2coppercorrosion,n—effectofachemicalattackoncoppermetalbyalubricantcausingvariouslevelsoftarnishingandchangeinappearance.3.2.1Discussion—Acidicandotheraggressivespecies,of-tensulfur-based,inalubricantcanattackcopperorcopperalloyspresentinbearingsorotherlubricatedsurfaces.Thepresenceofthisantagonisticinterac...
