1、Designation:D787320Standard Test Method forDetermination of Oxidation Stability and InsolublesFormation of Inhibited Turbine Oils at 120 C Without theInclusion of Water(Dry TOST Method)1This standard is issued under the fixed designation D7873;the number immediately following the designation indicat
2、es the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method is used to evaluate the sludgingte
3、ndencies of steam and gas turbine lubricants during theoxidation process in the presence of oxygen and metal catalyst(copper and iron)at an elevated temperature.This test methodmay be used to evaluate industrial oils(for example,circulat-ing oils and so forth).1.2 This test method is a modification
4、of Test MethodD4310 where the sludging and corrosion tendencies of thesame kinds of oils are determined after 1000 h at 95 C in thepresence of water.Water is omitted in this modification.1.3 The values stated in SI units are to be regarded asstandard.1.3.1 ExceptionThe values in parentheses in some
5、of thefigures are provided for information only for those using oldequipment based on non-SI units.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and e
6、nvironmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 WARNINGMercury has been designated by manyregulatory agencies as a hazardous substance that can causeserious medical issues.Mercury,or its vapor,has been dem-onstrated to be hazardous to health and cor
7、rosive to materials.Use Caution when handling mercury and mercury-containingproducts.See the applicable product Safety Data Sheet(SDS)for additional information.The potential exists that sellingmercury or mercury-containing products,or both,is prohibitedby local or national law.Users must determine
8、legality of salesin their location.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade
9、 Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2A510M Specification for General Requirements for WireRods and Coarse Round Wire,Carbon Steel(Metric)(Withdrawn 2011)3B1 Specification for Hard-Drawn Copper WireD943 Test Method for Oxidation Characterist
10、ics of InhibitedMineral OilsD1193 Specification for Reagent WaterD2272 Test Method for Oxidation Stability of Steam Tur-bine Oils by Rotating Pressure VesselD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4310 Test Method for Determination of Sludging andCorrosion Tendencies of
11、 Inhibited Mineral OilsE1 Specification for ASTM Liquid-in-Glass ThermometersE230/E230M Specification for Temperature-ElectromotiveForce(emf)Tables for Standardized Thermocouples2.2 Other Standards:Specification for IP Standard Thermometers4ISO3696 WaterforAnalyticalLaboratoryUseSpecification and Te
12、st Methods53.Terminology3.1 Definitions:3.1.1 sludge,na precipitate or sediment from oxidizedmineral oil that is insoluble in n-heptane.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D
13、02.09.0C on Oxidation of Turbine Oils.Current edition approved July 1,2020.Published July 2020.Originally approvedin 2013.Last previous edition approved in 2017 as D7873 13(2017).DOI:10.1520/D7873-20.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service a
14、t serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Energy Institute,61 New Cavendish St.,London,WIG 7AR,U.K.,http:/ww
15、w.energyinst.org.5Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.Un
16、ited StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.4.Summary of Test Method4.1 Atotal of six to eight tubes containing 360 mLof sampleeach are heated at 120 C with oxygen in the presence of aniron-copper catalyst.Each tube is
