1、Designation:D596921Standard Test Method forCorrosion-Preventive Properties of Lubricating Greases inPresence of Dilute Synthetic Sea Water Environments1This standard is issued under the fixed designation D5969;the number immediately following the designation indicates the year oforiginal adoption or
2、,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 covers the determination of thecorrosion-preventive properties of gr
3、eases using grease-lubricated tapered roller bearings exposed to various concen-trations of dilute synthetic sea water stored under wet condi-tions.It is based on Test Method D1743,which is practicedusing a similar procedure and distilled water.The reportedresult is a pass or fail rating as determin
4、ed by at least two ofthree bearings.1.2 Apparatus DimensionsThe values stated in inch-pound units are to be regarded as standard.The values given inparentheses are mathematical conversions to SI units that areprovided for information only and are not considered standard.1.3 All Other ValuesThe value
5、s 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,h
6、ealth,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 Intern
7、ational Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D665 Test Method for Rust-Preventing Characteristics ofInhibited Mineral Oil in the Presence of WaterD1193 Specification for Reagent
8、 WaterD1743 Test Method for Determining Corrosion PreventiveProperties of Lubricating Greases3.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
9、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 D5969 and shall beignored.D17434.Summary of
10、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 a solution of synthetic sea water at some percentagein distilled water,then stored for 24 h 612h at 52
11、C 6 1 Cand 100%relative humidity.After cleaning,the bearing cupsare examined for evidence of corrosion.5.Significance and Use5.1 This test method differentiates the relative corrosion-preventive capabilities of lubricating greases under the testconditions.6.Apparatus6.1 Bearings,Timken bearing cone
12、and roller assemblyLM11949 and cup LM11910.36.2 Motor,1750 r min(approximate)speed,115hp(min).6.3 Bearing Holder,(see Fig.1)consists of a 1 kg 6 0.01 kgmass,upper and lower plastic collars for the bearing cone(Parts A and B),a metal screw,and a plastic collar for the cup(Part C).6.4 Plastic Test Jar
13、,as shown in Fig.2.1This 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 Dec.1,2021.Published December 2021.Originallyappr
14、oved in 1996.Last previous edition approved in 2016 as D5969 11(2016).DOI:10.1520/D5969-21.2For 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
15、 page onthe ASTM website.3Manufactured by the Timken Co.,Canton,OH 44706.*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 accordanc
16、e 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.1?KEYDESCRIPTIONQUANTITY1PISTON12O RING13WEIGHT14UPPER FLANGE15LOWER FLANGE1614 20 1-14FILLISTER HD.MACH.SCREW S.S.17O RING18BEARING HOLDER19PLASTIC JAR110O RING1FIG.1 Test Method D1743 Bearing Holder AssemblyD5969 212?6.5 Run-in Stand,4as