【英文标准名称】:StandardGuideforMeasurementofRemainingPrimaryAntioxidantContentInIn-ServiceIndustrialLubricatingOilsbyLinearSweepVoltammetry
【原文标准名称】:用线性扫描伏安法测量使用中工业润滑油残留原始抗氧化剂含量的标准指南
【标准号】:ASTMD7590-2009e1
【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】:D02.09.0C
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:苯基甲萘胺;烷基化二苯胺;涡轮油;线性扫描伏安法(LSV);受阻酚抗氧化剂;芳香胺抗氧化剂;锌二烃基二硫代磷酸盐;抗氧化剂(石油);工业用油;胺价;线性扫描伏安法;涡轮润滑剂
【英文主题词】:phenylalphanaphthylamine;alkylateddiphenylamine;turbineoil;linearsweepvoltammetry(LSV);hinderedphenolantioxidant;aromaticamineantioxidant;zincdialkyldithiophosphates;Antioxidants(petroleum);Industrialoils;Aminevalues;Linearsweepvoltammet
【摘要】:Thequantitativedeterminationofremainingantioxidantsforin-serviceindustrialoilsbymeasuringtheamountoftheseadditivesthathavebeenaddedtotheoilasprotectionagainstoxidation.Industriallubricants,suchasturbineoils,compressoroils,gearoils,hydraulicoils,bearinglubricantsandgreasescanbeformulatedwithawidevarietyofantioxidantstypessuchasphenolsandamines(asprimaryantioxidants),whichareworkingsynergisticallyandthereforeallimportanttobemonitoredindividually.Forin-serviceoils,theLSVdeterminesandcomparestheamountoforiginalprimaryantioxidantsremainingafteroxidationhavereduceditsinitialconcentration.Thisguidecoversproceduresforprimaryantioxidantssuchasaminesandphenols,asdescribedbyTestMethodD6971andD6810.LSVisnotdesignedorintendedtodetectalloftheantioxidantintermediatesformedduringthethermalandoxidativestressingoftheoils,whicharerecognizedashavingsomecontributiontotheremainingusefullifeoftheusedorin-serviceoil.Inordertomeasuretheoverallstabilityofanoil(includingcontributionofintermediatespresent),andbeforemakingfinaljudgmentontheremainingusefullifeoftheusedoil(whichmightresultinthereplacementoftheoilreservoir),itisadvisedtoperformadditionalanalyticaltechniques(inaccordancewithPracticeD4378andPracticeD6224).Thisguideisapplicabletoawiderangeofindustrialoils,bothmineralorsyntheticbased,whichcancontainrustandoxidationinhibitors,antiwearadditivessuchaszincdialkyldithiophosphatesongearoils,circulatingoils,transmissionoilsandotherindustriallubricatingoils.Thetestisalsosuitableformanufacturingcontrolandspecificationacceptance.Whenavoltammetricanalysisisobtainedforaindustriallubricantinhibitedwithatleastonetypeofantioxidant,thereisanincreaseinthecurrentoftheproducedvoltammogrambetween5to8s(or0.5to0.8Vappliedvoltage)(seeNote1)forthezincdialkyldithiophosphatetypeofantioxidant(Fig.1),anincreaseinthecurrentoftheproducedvoltammogrambetween8to12s(or0.8to1.2Vappliedvoltage)(Fig.2)(seeNote1)forthearomaticamines,andincreaseinthecurrentoftheproducedvoltammogrambetween13and16s(or1.3to1.6Vappliedvoltage)(seeNote1)forthehinderedphenolsorcarbamatesintheneutralacetonesolution(Fig.2:x-axis1s=0.1V),orboth.Hinderedphenolantioxidantsdetectedbyvoltammetricanalysisinclude,butarenotlimitedto,2,6-di-tert-butyl-4-methylphenol;2,6-di-tert-butylphenoland4,4x2019;-Methylenebis(2,6-di-tert-butylphenol).Aromaticamineantioxidantsdetectedbyvoltammetricanalysisinclude,butarenotlimitedto,phenylalphanaphthylamines,andalkylateddiphenylamines.Note18212;Voltageslistedwithrespecttoreferenceelectrode.ThevoltammogramsshowninFigs.1-6wereobtainedwithaplatinumreferenceelectrodeandavoltagescanrateof0.1V/s.Forindustriallubricantscontainingzincdialkyldithiophosphatetypeofantioxidants,thereisanincreaseinthecurrentoftheproducedvoltammogrambetween5to8s(or0.5to0.8Vappliedvoltage)(seeNote1)byusingtheneutralacetonetestsolution(seeFig.1).ThereisnocorrespondingASTMInternationalstandarddescribingthetestmethodpr........
【中国标准分类号】:E34
【国际标准分类号】:75_100
【页数】:14P.;A4
【正文语种】:
基本信息
| 标准名称： | 冷冲模导正销和挡料装置 半自动挡料销 |
| 中标分类： |
机械 >>
工艺装备 >>
模具 |
| 发布日期： | 1984-12-24 |
| 实施日期： | 1985-07-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 1页 |
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所属分类： 机械 工艺装备 模具