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【英文标准名称】:TestMethodforDeterminationofYieldStressandApparentViscosityofEngineOilsatLowTemperature(05.03)
【原文标准名称】:测定低温发动机油屈服应力和表观粘度的试验方法
【标准号】:ANSI/ASTMD4684-2006
【标准状态】:作废
【国别】:美国
【发布日期】:2006
【实施或试行日期】:2006-11-21
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:石油产品;试验;粘度;低温;润滑剂;屈服应力
【英文主题词】:Lowtemperatures;Lubricants;Petroleumproducts;Testing;Viscosity;Yieldstress
【摘要】:Thistestmethodcoversthemeasurementoftheyieldstressandviscosityofengineoilsaftercoolingatcontrolledratesoveraperiodexceeding45htoafinaltesttemperaturebetween-10and-40?C.Theviscositymeasurementsaremadeatashearstressof525Paoverashearrateof0.4to15s.Theviscosityasmeasuredatthisshearstresswasfoundtoproducethebestcorrelationbetweenthetemperatureatwhichtheviscosityreachedacriticalvalueandborderlinepumpingfailuretemperatureinengines.ProcedureAofthistestmethodhasprecisionstatedforayieldrangefromlessthan35Pato210Paandapparentviscosityrangefrom4300to270000mPas.Thetestprocedurecandeterminehigheryieldstressandviscositylevels.Thistestmethodisapplicableforunusedoils,sometimesreferredtoasfreshoils,designedforbothlightdutyandheavydutyengineapplications.Italsohasbeenshowntobesuitableforuseddieselandgasolineengineoils.Theapplicabilitytopetroleumproductsotherthanengineoilshasnotbeendetermined.ThistestmethodusesthemilliPascalsecond(m?Pas)astheunitofviscosity.Forinformation,theequivalentunit,centiPoise(cP),isshowninparentheses.Thistestmethodcontaintwoprocedures:ProcedureAincorporatesseveralequipmentandproceduralmodificationsfromTestMethodD4684-02thathaveshowntoimprovetheprecisionofthetest,whileProcedureBisunchangedfromTestMethodD4684-02.Additionally,ProcedureAappliestothoseinstrumentsthatutilizethermoelectriccoolingtechnologyandthosethatuseindirectrefrigerationtechnologyofrecentmanufactureforinstrumenttemperaturecontrol.ProcedureBcanusethesameinstrumentsusedinProcedureAorthosecooledbycirculatingmethanol.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E34
【国际标准分类号】:75_100
【页数】:
【正文语种】:英语