Designation:D6203−22StandardTestMethodforThermalStabilityofWayLubricants1ThisstandardisissuedunderthefixeddesignationD6203;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoverstheevaluationofthethermalstabilityofhydrocarbon-basedwaylubricants,althoughoxida-tionmayoccurduringthetest.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.1.2.1Exception—Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D4057PracticeforManualSamplingofPetroleumandPetroleumProductsD4175TerminologyRelatingtoPetroleumProducts,LiquidFuels,andLubricants2.2OtherStandards:UNSC11000ElectrolyticToughPitchCopper3AISIW11%CarbonToolSteel43.Terminology3.1Definitions:3.1.1Fordefinitionsoftermsusedinthistestmethod,refertoTerminologyD4175.4.SummaryofTestMethod4.1Abeakercontainingtestoilandcopperandsteelrodsisplacedinagravityconvectionelectricovenfor24hatatesttemperatureof100°C.Atthecompletionofthetest,thecopperandsteelrodsarevisuallyratedfordiscolorationandthebeakerisvisuallyevaluatedfordeposits.5.SignificanceandUse5.1Thermalstabilitycharacterizesphysicalandchemicalpropertychangeswhichmayadverselyaffectanoil’slubricat-ingperformance.Thistestmethodevaluatesthethermalstabilityofawaylubricantinthepres...
