ASTM D6896-2003(2007) 低温下废机油的屈服应力和表观粘度测定的标准试验方法
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【英文标准名称】:StandardTestMethodforDeterminationofYieldStressandApparentViscosityofUsedEngineOilsatLowTemperature
【原文标准名称】:低温下废机油的屈服应力和表观粘度测定的标准试验方法
【标准号】:ASTMD6896-2003(2007)
【标准状态】:现行
【国别】:美国
【发布日期】:2003
【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】:D02.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:lowtemperatureflowproperties;lowtemperatureviscosity;mini-rotaryviscometer;pumpingviscosity;useddieselengineoil;viscosity;yieldstress;Apparentviscosity;Low-temperaturetesting;Mini-rotaryviscometer;Pumpingviscosity;Usedeng
【摘要】:Whenanengineoiliscooled,therateanddurationofcoolingcanaffectitsyieldstressandviscosity.Inthislaboratorytest,usedengineoilisslowlycooledthroughatemperaturerangewherewaxcrystallizationisknowntooccur,followedbyrelativelyrapidcoolingtothefinaltesttemperature.AsinotherlowtemperaturerheologicaltestssuchasTestMethodsD3829,D4684,andD5133,apreheatingconditionisrequiredtoensurethatallresidualwaxesaresolubilizedintheoilpriortothecooldown(thatis,removethermalmemory).However,itisalsoknownthathighlysooteduseddieselengineoilscanexperienceasootagglomerizationphenomenonwhenheatedunderquiescentconditions.Thecurrentmethodusesaseparatepreheatandagitationsteptobreakupanysootagglomerizationthatmayhaveoccurredpriortocooldown.Theviscosityofhighlysooteddieselengineoilsasmeasuredinthistestmethodhavebeencorrelatedtopressurizationtimesinamotoredenginetest(1).CoolingProfiles:Foroilstobetestedat-20x00B0;Cand-25x00B0;C,TableX1.1applies.ThecoolingprofiledescribedinTableX1.1isbasedontheviscositypropertiesoftheASTMPumpabilityReferenceOils(PRO).Thisseriesofoilsincludesoilswithnormallow-temperatureflowpropertiesandoilsthathavebeenassociatedwithlow-temperaturepumpabilityproblems(2-7).1.1Thistestmethodcoversthemeasurementoftheyieldstressandviscosityofengineoilsaftercoolingatcontrolledratesoveraperiodof43or45htoafinaltesttemperatureof-20or-25x00B0;C.Theviscositymeasurementsaremadeatashearstressof525Paoverashearrateof0.4to15s-1.Thistestmethodissuitableformeasurementofviscositiesrangingfrom4000mPax00B7;sto>400000mPax00B7;s,andissuitableforyieldstressmeasurementsof7Pato>350Pa.1.2Thistestmethodisapplicableforuseddieseloils.Theapplicabilityandprecisiontootherusedorunusedengineoilsortopetroleumproductsotherthanengineoilshasnotbeendetermined.1.3Thistestmethodusesthemillipascalsecond(mPax00B7;s)astheunitofviscosity.Forinformation,theequivalentcentipoiseunitisshowninparentheses.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E34
【国际标准分类号】:43_060_40
【页数】:8P.;A4
【正文语种】:英语
【原文标准名称】:低温下废机油的屈服应力和表观粘度测定的标准试验方法
【标准号】:ASTMD6896-2003(2007)
【标准状态】:现行
【国别】:美国
【发布日期】:2003
【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】:D02.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:lowtemperatureflowproperties;lowtemperatureviscosity;mini-rotaryviscometer;pumpingviscosity;useddieselengineoil;viscosity;yieldstress;Apparentviscosity;Low-temperaturetesting;Mini-rotaryviscometer;Pumpingviscosity;Usedeng
【摘要】:Whenanengineoiliscooled,therateanddurationofcoolingcanaffectitsyieldstressandviscosity.Inthislaboratorytest,usedengineoilisslowlycooledthroughatemperaturerangewherewaxcrystallizationisknowntooccur,followedbyrelativelyrapidcoolingtothefinaltesttemperature.AsinotherlowtemperaturerheologicaltestssuchasTestMethodsD3829,D4684,andD5133,apreheatingconditionisrequiredtoensurethatallresidualwaxesaresolubilizedintheoilpriortothecooldown(thatis,removethermalmemory).However,itisalsoknownthathighlysooteduseddieselengineoilscanexperienceasootagglomerizationphenomenonwhenheatedunderquiescentconditions.Thecurrentmethodusesaseparatepreheatandagitationsteptobreakupanysootagglomerizationthatmayhaveoccurredpriortocooldown.Theviscosityofhighlysooteddieselengineoilsasmeasuredinthistestmethodhavebeencorrelatedtopressurizationtimesinamotoredenginetest(1).CoolingProfiles:Foroilstobetestedat-20x00B0;Cand-25x00B0;C,TableX1.1applies.ThecoolingprofiledescribedinTableX1.1isbasedontheviscositypropertiesoftheASTMPumpabilityReferenceOils(PRO).Thisseriesofoilsincludesoilswithnormallow-temperatureflowpropertiesandoilsthathavebeenassociatedwithlow-temperaturepumpabilityproblems(2-7).1.1Thistestmethodcoversthemeasurementoftheyieldstressandviscosityofengineoilsaftercoolingatcontrolledratesoveraperiodof43or45htoafinaltesttemperatureof-20or-25x00B0;C.Theviscositymeasurementsaremadeatashearstressof525Paoverashearrateof0.4to15s-1.Thistestmethodissuitableformeasurementofviscositiesrangingfrom4000mPax00B7;sto>400000mPax00B7;s,andissuitableforyieldstressmeasurementsof7Pato>350Pa.1.2Thistestmethodisapplicableforuseddieseloils.Theapplicabilityandprecisiontootherusedorunusedengineoilsortopetroleumproductsotherthanengineoilshasnotbeendetermined.1.3Thistestmethodusesthemillipascalsecond(mPax00B7;s)astheunitofviscosity.Forinformation,theequivalentcentipoiseunitisshowninparentheses.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E34
【国际标准分类号】:43_060_40
【页数】:8P.;A4
【正文语种】:英语
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