ASTM D4742-2008e1 用氧化薄膜吸收法对汽车发动机油氧化稳定性的标准试验方法

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【英文标准名称】:StandardTestMethodforOxidationStabilityofGasolineAutomotiveEngineOilsbyThin-FilmOxygenUptake(TFOUT)
【原文标准名称】:用氧化薄膜吸收法对汽车发动机油氧化稳定性的标准试验方法
【标准号】:ASTMD4742-2008e1
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D02.09.0G
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:oxidationstability;oxygenuptake;sequenceIIIDenginesimulation;TFOUT;Automotiveenginefuels/oils;Bombmethods;Fueloils;Lubricants(fluid);Lubricatingoils;Oxidativestability;Oxygenbombmethod;Oxygenuptake;Simulationtesting;Stability-
【摘要】:Thistestmethodisusedtoevaluateoxidationstabilityoflubricatingbaseoilswithadditivesinthepresenceofchemistriessimilartothosefoundingasolineengineservice.TestresultsonsomeASTMreferenceoilshavebeenfoundtocorrelatewithsequenceIIIDenginetestresultsinhoursfora375%viscosityincrease.Thetestdoesnotconstituteasubstituteforenginetesting,whichmeasureswear,oxidationstability,volatility,anddepositcontrolcharacteristicsoflubricants.Properlyinterpreted,thetestmayprovideinputontheoxidationstabilityoflubricantsundersimulatedenginechemistry.Thistestmethodisintendedtobeusedasabenchscreeningtestandqualitycontroltoolforlubricatingbaseoilmanufacturing,especiallyforre-refinedlubricatingbaseoils.Thistestmethodisusefulforqualitycontrolofoxidationstabilityofre-refinedoilsfrombatchtobatch.Thistestmethodisusefulforscreeningformulatedoilspriortoenginetests.Withinsimilaradditivechemistryandbaseoiltypes,therankingofoilsinthistestappearstobepredictiveofrankinginenginetests.Whenoilshavingcompletelydifferentadditivechemistryorbaseoiltypearecompared,oxidationstabilityresultsmaynotreflecttheactualenginetestresult.Otheroxidationstabilitytestmethodshavedemonstratedthatsolublemetalcatalystsuppliesareveryinconsistentandtheyhavesignificanteffectsonthetestresults.Thus,fortestcomparisons,thesamesourceandsamebatchofmetalnaphthenatesshallbeused.Note28212;Itisalsorecommendedasagoodresearchpracticenottousedifferentbatchesofthefuelcomponentintestcomparisons.1.1Thistestmethodevaluatestheoxidationstabilityofengineoilsforgasolineautomotiveengines.Thistest,runat160x00B0;C,utilizesahighpressurereactorpressurizedwithoxygenalongwithametalcatalystpackage,afuelcatalyst,andwaterinapartialsimulationoftheconditionstowhichanoilmaybesubjectedinagasolinecombustionengine.Thistestmethodcanbeusedforengineoilswithviscosityintherangefrom4mm2/s(cSt)to21mm2/s(cSt)at100x00B0;C,includingre-refinedoils.1.2Thistestmethodisnotasubstitutefortheenginetestingofanengineoilinestablishedenginetests,suchasSequenceIIID.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3.1Exception8212;Pressureunitsareprovidedinpsig,anddimensionsareprovidedininchesinAnnexA1,becausethesearetheindustryacceptedstandardandtheapparatusisbuiltaccordingtothefiguresshown.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecificwarningstatements,seeSections7and8.
【中国标准分类号】:E34
【国际标准分类号】:75_100
【页数】:11P.;A4
【正文语种】:英语