ASTM D4742-2002a 用薄膜氧吸收法测定汽油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】:用薄膜氧吸收法测定汽油汽车发动机油氧化稳定性的标准试验方法
【标准号】:ASTMD4742-2002a
【标准状态】:现行
【国别】:
【发布日期】:2002
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D02.09.0G
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验方法;抗氧化;润滑油;汽油发动机
【英文主题词】:oxidationstability;oxygenuptake;sequenceIIIDenginesimulation;TFOUT;
【摘要】:Thistestmethodisusedtoevaluateoxidationstabilityoflubricatingbaseoilswithadditivesinthepresenceofchemistriessimilartothosefoundingasolineengineservice.TestresultsonsomeASTMreferenceoilshavebeenfoundtocorrelatewithsequenceIIIDenginetestresultsinhoursfora375%viscosityincrease.8Thetestdoesnotconstituteasubstituteforenginetesting,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,runat160176;C,utilizesahighpressurereactorpressurizedwithoxygenalongwithametalcatalystpackage,afuelcatalyst,andwaterinapartialsimulationoftheconditionstowhichanoilmaybesubjectedinagasolinecombustionengine.Thistestmethodcanbeusedforengineoilswithviscosityintherangefrom4mm2/s(cSt)to21mm2/s(cSt)at100176;C,includingre-refinedoils.1.2Thistestmethodisnotasubstitutefortheenginetestingofanengineoilinestablishedenginetests,suchasSequenceIIID.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareprovidedforinformationpurposesonly.
【中国标准分类号】:E34
【国际标准分类号】:75_100
【页数】:10P.;A4
【正文语种】:
【原文标准名称】:用薄膜氧吸收法测定汽油汽车发动机油氧化稳定性的标准试验方法
【标准号】:ASTMD4742-2002a
【标准状态】:现行
【国别】:
【发布日期】:2002
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D02.09.0G
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验方法;抗氧化;润滑油;汽油发动机
【英文主题词】:oxidationstability;oxygenuptake;sequenceIIIDenginesimulation;TFOUT;
【摘要】:Thistestmethodisusedtoevaluateoxidationstabilityoflubricatingbaseoilswithadditivesinthepresenceofchemistriessimilartothosefoundingasolineengineservice.TestresultsonsomeASTMreferenceoilshavebeenfoundtocorrelatewithsequenceIIIDenginetestresultsinhoursfora375%viscosityincrease.8Thetestdoesnotconstituteasubstituteforenginetesting,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,runat160176;C,utilizesahighpressurereactorpressurizedwithoxygenalongwithametalcatalystpackage,afuelcatalyst,andwaterinapartialsimulationoftheconditionstowhichanoilmaybesubjectedinagasolinecombustionengine.Thistestmethodcanbeusedforengineoilswithviscosityintherangefrom4mm2/s(cSt)to21mm2/s(cSt)at100176;C,includingre-refinedoils.1.2Thistestmethodisnotasubstitutefortheenginetestingofanengineoilinestablishedenginetests,suchasSequenceIIID.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareprovidedforinformationpurposesonly.
【中国标准分类号】:E34
【国际标准分类号】:75_100
【页数】:10P.;A4
【正文语种】:
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