【英文标准名称】:StandardTestMethodforConditionMonitoringofPhosphateAntiwearAdditivesinIn-ServicePetroleumandHydrocarbonBasedLubricantsbyTrendAnalysisUsingFourierTransformInfrared(FT-IR)Spectrometry
【原文标准名称】:使用傅里叶变换红外(FT-R)光谱法通过趋势分析对使用中的石油和碳氢化合物基润滑剂中的磷酸酯抗磨剂进行状态监控的标准试验方法
【标准号】:ASTMD7412-2009
【标准状态】:现行
【国别】:
【发布日期】:2009
【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】:D02.96
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:条件控制
【英文主题词】:conditionmonitoring;differentialtrendanalysis;directtrendanalysis;Fouriertransforminfrared;FT-IR;hydrocarbonbasedlubricants;in-servicepetroleumlubricants;infrared;IR;lubricants;oils;phosphateantiwear
【摘要】:Antiwearadditivesarecommonlyusedinpetroleumandhydrocarbonbasedlubricantstopreventmachinerywearbyformingachemicalbarrieractivatedbyfrictionalheat.AntiwearadditivesthatarephosphatebasedcanbemeasuredbyFT-IRspectroscopyusingthephosphateabsorptionband.Initially,phosphateantiwearadditiveswilldecomposeandformaprotectivefilmbybindingtometalsurfacesandthroughoxidativemechanisms,andsoadecreaseinthelevelofphosphateantiwearadditiverelativetothatinthenewoilisexpectedduringnormalmachineryoperation.Subsequently,significantdepletionofphosphateantiwearadditivesduetooxidationorhydrolysiscanoccurwhenthelubricantissubjectedtohightemperaturesandhighlevelsofmoisture.Thisusuallyoccurspriortothepointwheretheoxidationofthelubricantbeginstoacceleratex2014;makingtrendingofphosphateantiwearadditivesausefulindicatorofthelubricantx2019;sremainingin-servicelife.Monitoringofphosphateantiwearadditivedepletionisthereforeanimportantparameterindeterminingoverallmachineryhealthandshouldbeconsideredinconjunctionwithdatafromothertestssuchasatomicemission(AE)andatomicabsorption(AA)spectroscopyforwearmetalanalysis(TestMethodD5185),physicalpropertytests(TestMethodsD445,D2896,andD6304)andotherFT-IRoilanalysismethodsforoxidation(TestMethodD7414),sulfateby-products(TestMethodD7415),nitration,breakdownproductsandexternalcontaminants(PracticeE2412),whichalsoassesselementsoftheoilx2019;scondition,seeRefs(1-6).1.1Thistestmethodcoversmonitoringphosphateantiwearadditivesinin-servicepetroleumandhydrocarbonbasedlubricantssuchasvarioustypesofengineoils,hydraulicoils,andotherlubricantsthatareformulatedforprotectionagainstwear.Typicalphosphateantiwearadditivesincludezincdialkyldithiophosphates,trialkylphosphatesandtriarylphosphates.1.2ThistestmethodusesFourierTransformInfrared(FT-IR)spectrometryformonitoringofphosphateantiwearadditivedepletioninin-servicepetroleumandhydrocarbonbasedlubricantsasaresultofnormalmachineryoperation.Monitoringthedepletionofphosphateantiwearadditivesinin-servicelubricantscanindicateunusualwearorsevereoperatingconditionsofthemachine.Thistestmethodisdesignedasafast,simplespectroscopiccheckformonitoringofphosphateantiwearadditivesinin-servicepetroleumandhydrocarbonbasedlubricantswiththeobjectiveofhelpingdiagnosetheoperationalconditionofthemachinebasedonmeasuringthelevelofphosphateantiwearadditivesintheoil.1.3AcquisitionofFT-IRspectraldataformeasuringphosphateantiwearadditivesinin-serviceoilandlubricantsamplesisdescribedinPracticeD7418.Inthistestmethod,measurementanddatainterpretationparametersforphosphateantiwearadditivesusingbothdirecttrendanalysisanddifferential(spectralsubtraction)trendanalysisarepresented.1.4Thistestmethodisbasedontrendingofspectralchangesassociatedwithphosphateantiwearadditivesinin-servicepetroleumandhydrocarbonbasedlubricants.Warningsoralarmlimitscanbesetonthebasisofafixedminimumvalueforasinglemeasurementor,alternatively,canbebasedonarateofchangeoftheresponsemeasured,seeRef(1).1.4.1Fordirecttrendanalysis,valuesarerecordeddirectlyfromabsorptionspectraandreportedinunitsofabsorbanceper0.1mmpathlength.1.4.2Fordifferentialtrendanalysis,valuesarerecordedfromthedifferential......
【中国标准分类号】:
【国际标准分类号】:75_100
【页数】:5P.;A4
【正文语种】: