Designation:D7098−08(Reapproved2015)StandardTestMethodforOxidationStabilityofLubricantsbyThin-FilmOxygenUptake(TFOUT)CatalystB1,2ThisstandardisissuedunderthefixeddesignationD7098;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoverstheoxidationstabilityoflubricantsbythin-filmoxygenuptake(TFOUT)CatalystB.Thistestmethodevaluatestheoxidationstabilityofpetroleumproducts,anditwasoriginallydevelopedasascreeningtesttoindicatewhetheragivenre-refinedbasestockcouldbeformulatedforuseasautomotiveengineoil3(seeTestMethodD4742).Thetestisrunat160°Cinapressurevesselunderoxygenpressure,andthesamplecontainsametalcatalystpackage,afuelcatalyst,andwatertopartiallysimulateoilconditionsinanoperatingengine.Inaddition,thetestmethodhassincebeenfoundbroadlyusefulasanoxidationtestofpetroleumproducts.41.2Theapplicablerangeoftheinductiontimeisfromafewminutesuptoseveralhundredminutesormore.However,therangeofinductiontimesusedfordevelopingtheprecisionstatementsinthistestmethodwasfrom40minto280min.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3.1Exception—Pressureunitsareprovidedinpsig,anddimensionsareprovidedininchesinAnnexA1andAnnexA2,becausethesearetheindustryacceptedstandardandtheapparatusisbuiltaccordingtothefiguresshown.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:5A314SpecificationforStainlessSteelBilletsandBarsforForgingB211SpecificationforAluminumandAluminum-AlloyRolledorColdFinishedBar,Rod,andWireD664TestMethodforAcidNumberofPetroleumProductsbyPotentiometricTitrat...
