ASTM_D_943_-_20.pdf

Designation:D94320BS 2000-280:1999Standard Test Method forOxidation Characteristics of Inhibited Mineral Oils1This standard is issued under the fixed designation D943;the number immediately following the designation indicates 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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method covers the evaluation of the oxidationstability of inhibited steam-turbine oils in the presence ofoxygen,water,and copper and iron metals at an elevatedtemperature.This test method is limited to a maximum testingtime of 10 000 h.This test method is also used for testing otheroils,such as hydraulic oils and circulating oils having a specificgravity less than that of water and containing rust and oxidationinhibitors.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.2.1 ExceptionThe values in parentheses in the figuresare provided for information for those using old equipmentbased on non-SI units.1.3 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 corrosive 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 legality of salesin their location.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 environmental practices and deter-mine the applicability of regulatory limitations prior to use.For specific warning statements,see Section 7.1.5 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 Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2A510 Specification for General Requirements for Wire Rodsand Coarse Round Wire,Carbon Steel(Metric)A0510_A0510MB1 Specification for Hard-Drawn Copper WireD664 Test Method for Acid Number of Petroleum Productsby Potentiometric TitrationD1193 Specification for Reagent WaterD3244 Practice for Utilization of Test Data to DetermineConformance with SpecificationsD3339 Test Method forAcid Number of Petroleum Productsby Semi-Micro Color Indicator TitrationD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4310 Test Method for Determination of Sludging andCorrosion Tendencies of Inhibited Mineral OilsD5770 Test Method for Semiquantitative Micro Determina-tion of Acid Number of Lubricating Oils During Oxida-tion TestingE1 Specification for ASTM Liquid-in-Glass ThermometersE2877 Guide for Digital Contact Thermometers2.2 Energy Institute Standards:3Specifications for IP Standard Thermometers2.3 British Standard:4BS 18293.Terminology3.1 Definitions:1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.09.0C on Oxidation of Turbine Oils.Current edition approved June 1,2020.Published July 2020.Originally approvedin 1947.Last previous edition approved in 2019 as D943 19.DOI:10.1520/D0943-20.In 1976,this test method ceased to be a joint ASTM-IP standard.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from Energy Institute,61 New Cavendish St.,London,W1G 7AR,U.K.,http:/www.energyinst.org.4Available from British Standards Institution(BSI),389 Chiswick High Rd.,London W4 4AL,U.K.,http:/.*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.United 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.13.1.1 acid number,nthe quantity of a specified base,expressed in milligrams of potassium hydroxide per gram ofsample,required to titrate a sample in a specified solvent to aspecified endpoint using