ASTM_D_1743_-_22.pdf

Designation:D174322Standard Test Method forDetermining Corrosion Preventive Properties of LubricatingGreases1This standard is issued under the fixed designation D1743;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 determination of the corro-sion preventive properties of greases using grease-lubricatedtapered roller bearings stored under wet conditions.This testmethod is based on CRC Technique L 412that shows correla-tions between laboratory results and service for grease lubri-cated aircraft wheel bearings.1.2 Apparatus DimensionsThe values stated in SI unitsare to be regarded as standard.The values given in parenthesesare for information only.1.3 All Other ValuesThe values stated in SI units are to beregarded as standard.No other units of measurement areincluded in this standard.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.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:3D1193 Specification for Reagent WaterD5969 Test Method for Corrosion-Preventive Properties ofLubricating Greases in Presence of Dilute Synthetic SeaWater Environments3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 corrosion,nthe chemical or electrochemical reac-tion between a material,usually a metal,and its environmentthat produces a deterioration of the material and its properties.3.1.1.1 DiscussionIn this test method,corrosion is mani-fested by red rust or black stains on the bearing race.Stains,through which the underlying metal surface is still visible,arenot considered corrosion in Test Method D1743 and shall beignored.4.Summary of Test Method4.1 New,cleaned,and lubricated bearings are run under alight thrust load for 60 s 6 3 s to distribute the lubricant in apattern that might be found in service.The bearings areexposed to water,then stored for 48 h 6 0.5 h at 52 C 6 1 C(125 F 6 2 F)and 100%relative humidity.After cleaning,the bearing cups are examined for evidence of corrosion.5.Significance and Use5.1 This test method differentiates the relative corrosion-preventive capabilities of lubricating greases under the condi-tions of the test.6.Apparatus6.1 BearingsTimken bearing cone and roller assemblyLM11949,and cup LM11910.4,56.2 Motor,1750 r min 6 50 r min speed,115hp(min).6.3 Bearing Holder,consists of a 1 kg 6 0.010 kg weight,upper and lower plastic collars for the bearing cone(Parts Aand B),a metal screw,and a plastic collar for the cup(Part C).(See Fig.1.)1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.G0.06 on Functional Tests-Contamination.Current edition approved May 1,2022.Published May 2022.Originallyapproved in 1960.Last previous edition approved in 2021 as D1743 21.DOI:10.1520/D1743-22.2“Research Technique for Determining Rust-Preventive Properties of Lubricat-ing Greases in the Presence of Free Water,”L-41-957,undated,CoordinatingResearch Council,Inc.,219 Perimeter Center Parkway,Atlanta,GA 30346.3For 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.4The sole source of supply of the apparatus known to the committee at this timeis The Timken Co.,Canton,OH 44706.5If you are aware of alternative suppliers,please provide this information toASTM International Headquarters.Your comments will receive careful consider-ation at a meeting of the responsible technical committee,1which you may attend.*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.1KEYDESCRIPTIONQUANTITY