1、Designation:D5969111Standard 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 o
2、r,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.1NOTEFig.6 was editorially reinstated in January 2013.1.Scope*1.1 This test method covers the de
3、termination of thecorrosion-preventive properties of greases 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.
4、The reportedresult is a pass or fail rating as determined 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 ar
5、e not considered standard.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 u
6、ser of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D665 Test Method for Rust-Preventing Characteristics ofInhibited Mineral Oil in the Presence of WaterD1193 Spec
7、ification for Reagent WaterD1743 Test Method for Determining Corrosion PreventiveProperties of Lubricating Greases3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 corrosionthe chemical or electrochemical reactionbetween a material,usually a metal,and its environment thatproduces
8、 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 D5969 and shall beignored.D
9、17434.Summary of Test Method4.1 New,cleaned,and lubricated bearings are run under alight thrust load for 60 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 2
10、4 612h at 52 6 1C and100%relative humidity.After cleaning,the bearing cups areexamined 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 bea
11、ring cone and roller assemblyLM11949 and cup LM11910.36.2 Motor,1750-rpm(approximate)speed,115hp(min).6.3 Bearing Holder,(see Fig.1)consists of a 1 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 Tes
12、t Jar,as shown in Fig.2.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.G0.06 on Functional Tests-Contamination.Current edition approved May 1,2011.Published May 2011.Originallyapproved in 1996.
13、Last previous edition approved in 2008 as D596908.DOI:10.1520/D5969-11.2For 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 web
14、site.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 States1 KEYDESCRIPTIONQUANTITY1PISTON12O RING13WEIGHT14UPPER FLANGE15LOWER FLANG
15、E1614 20 1-14FILLISTER HD.MACH.SCREW S.S.17O RING18BEARING HOLDER19PLASTIC JAR110O RING1FIG.1 Test Method D1743 Bearing Holder AssemblyD5969 1112 6.5 Run-in Stand,4as shown in Fig.3.6.6 Spindle/Thrust Loading Device,3as shown in Fig.4.6.7 Mechanical Grease Packer,as shown in Fig.5.6.8 Pliers,5as sho
16、wn in Fig.6.6.9 Syringe,of at least 100 6 5 mL volume and with aneedle of at least 16 gauge and a minimum length of 100 mm(4 in.).6.10 Timer,capable of measuring a 60 6 3-s interval.6.11 Oven,a laboratory oven,essentially free of vibration,capable of maintaining 52 6 1C.7.Reagents7.1 Purity of ReagentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it is intended thatall reagents shall conform to the specifications of the Commit-tee on Analytical Reagents of the Amer
