ASTM D664-2007 用电位滴定法测定石油产品酸值的标准试验方法
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【英文标准名称】:StandardTestMethodforAcidNumberofPetroleumProductsbyPotentiometricTitration
【原文标准名称】:用电位滴定法测定石油产品酸值的标准试验方法
【标准号】:ASTMD664-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:D02.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:酸值;润滑剂;石油产品;电势分析法;电位测量法;测试
【英文主题词】:acidnumber;lubricants;petroleumproducts;potentiometric;strongacidnumber;titration
【摘要】:Newandusedpetroleumproductsmaycontainacidicconstituentsthatarepresentasadditivesorasdegradationproductsformedduringservice,suchasoxidationproducts.Therelativeamountofthesematerialscanbedeterminedbytitratingwithbases.Theacidnumberisameasureofthisamountofacidicsubstanceintheoil,alwaysundertheconditionsofthetest.Theacidnumberisusedasaguideinthequalitycontroloflubricatingoilformulations.Itisalsosometimesusedasameasureoflubricantdegradationinservice.Anycondemninglimitsmustbeempiricallyestablished.Sinceavarietyofoxidationproductscontributetotheacidnumberandtheorganicacidsvarywidelyincorrosionproperties,thetestmethodcannotbeusedtopredictcorrosivenessofoilunderserviceconditions.Nogeneralcorrelationisknownbetweenacidnumberandthecorrosivetendencyofoilstowardmetals.1.1Thistestmethodcoversproceduresforthedeterminationofacidicconstituentsinpetroleumproductsandlubricantssolubleornearlysolubleinmixturesoftolueneandpropan-2-ol.Itisapplicableforthedeterminationofacidswhosedissociationconstantsinwaterarelargerthan10-9;extremelyweakacidswhosedissociationconstantsaresmallerthan10-9donotinterfere.Saltsreactiftheirhydrolysisconstantsarelargerthan10-9.Therangeofacidnumbersincludedintheprecisionstatementis0.1mg/gKOHto150mg/gKOH.Note1Innewandusedoils,theconstituentsthatmaybeconsideredtohaveacidiccharacteristicsincludeorganicandinorganicacids,esters,phenoliccompounds,lactones,resins,saltsofheavymetals,saltsofammoniaandotherweakbases,acidsaltsofpolybasicacids,andadditionagentssuchasinhibitorsanddetergents.1.2Thetestmethodmaybeusedtoindicaterelativechangesthatoccurinoilduringuseunderoxidizingconditionsregardlessofthecolororotherpropertiesoftheresultingoil.Althoughthetitrationismadeunderdefiniteequilibriumconditions,thetestmethodisnotintendedtomeasureanabsoluteacidicpropertythatcanbeusedtopredictperformanceofoilunderserviceconditions.Nogeneralrelationshipbetweenbearingcorrosionandacidnumberisknown.Note2TheacidnumberobtainedbythisstandardmayormaynotbenumericallythesameasthatobtainedinaccordancewithTestMethodsD974andD3339.Therehasnotbeenanyattempttocorrelatethismethodwithothernon-titrationmethods.Note3AfewlaboratorieshavemadetheobservationthatthereisadifferenceinTestMethodD664resultswhenaqueousversusnonaqueousbuffersareused.1.3hevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E30
【国际标准分类号】:75_080;75_080;75_080;75_080;75_080
【页数】:8P.;A4
【正文语种】:
【原文标准名称】:用电位滴定法测定石油产品酸值的标准试验方法
【标准号】:ASTMD664-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:D02.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:酸值;润滑剂;石油产品;电势分析法;电位测量法;测试
【英文主题词】:acidnumber;lubricants;petroleumproducts;potentiometric;strongacidnumber;titration
【摘要】:Newandusedpetroleumproductsmaycontainacidicconstituentsthatarepresentasadditivesorasdegradationproductsformedduringservice,suchasoxidationproducts.Therelativeamountofthesematerialscanbedeterminedbytitratingwithbases.Theacidnumberisameasureofthisamountofacidicsubstanceintheoil,alwaysundertheconditionsofthetest.Theacidnumberisusedasaguideinthequalitycontroloflubricatingoilformulations.Itisalsosometimesusedasameasureoflubricantdegradationinservice.Anycondemninglimitsmustbeempiricallyestablished.Sinceavarietyofoxidationproductscontributetotheacidnumberandtheorganicacidsvarywidelyincorrosionproperties,thetestmethodcannotbeusedtopredictcorrosivenessofoilunderserviceconditions.Nogeneralcorrelationisknownbetweenacidnumberandthecorrosivetendencyofoilstowardmetals.1.1Thistestmethodcoversproceduresforthedeterminationofacidicconstituentsinpetroleumproductsandlubricantssolubleornearlysolubleinmixturesoftolueneandpropan-2-ol.Itisapplicableforthedeterminationofacidswhosedissociationconstantsinwaterarelargerthan10-9;extremelyweakacidswhosedissociationconstantsaresmallerthan10-9donotinterfere.Saltsreactiftheirhydrolysisconstantsarelargerthan10-9.Therangeofacidnumbersincludedintheprecisionstatementis0.1mg/gKOHto150mg/gKOH.Note1Innewandusedoils,theconstituentsthatmaybeconsideredtohaveacidiccharacteristicsincludeorganicandinorganicacids,esters,phenoliccompounds,lactones,resins,saltsofheavymetals,saltsofammoniaandotherweakbases,acidsaltsofpolybasicacids,andadditionagentssuchasinhibitorsanddetergents.1.2Thetestmethodmaybeusedtoindicaterelativechangesthatoccurinoilduringuseunderoxidizingconditionsregardlessofthecolororotherpropertiesoftheresultingoil.Althoughthetitrationismadeunderdefiniteequilibriumconditions,thetestmethodisnotintendedtomeasureanabsoluteacidicpropertythatcanbeusedtopredictperformanceofoilunderserviceconditions.Nogeneralrelationshipbetweenbearingcorrosionandacidnumberisknown.Note2TheacidnumberobtainedbythisstandardmayormaynotbenumericallythesameasthatobtainedinaccordancewithTestMethodsD974andD3339.Therehasnotbeenanyattempttocorrelatethismethodwithothernon-titrationmethods.Note3AfewlaboratorieshavemadetheobservationthatthereisadifferenceinTestMethodD664resultswhenaqueousversusnonaqueousbuffersareused.1.3hevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E30
【国际标准分类号】:75_080;75_080;75_080;75_080;75_080
【页数】:8P.;A4
【正文语种】:
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