ASTM_D_6185_-_11_2017.pdf

Designation:D618511(Reapproved 2017)Standard Practice forEvaluating Compatibility of Binary Mixtures of LubricatingGreases1This standard is issued under the fixed designation D6185;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.1.Scope1.1 This practice covers a protocol for evaluating thecompatibility of one or three binary mixtures of lubricatinggreases by comparing their properties or performance relativeto those of the neat greases comprising the mixture.1.2 Three properties are evaluated in a primary testingprotocol using standard test methods:(1)dropping point byTest Method D566(or Test Method D2265);(2)shear stabilityby Test Methods D217,100 000-stroke worked penetration;and(3)storage stability at elevated-temperature by change in60-stroke penetration(Test Method D217).For compatiblemixtures(those passing all primary testing),a secondary(nonmandatory)testing scheme is suggested when circum-stances indicate the need for additional testing.1.3 Sequential or concurrent testing is continued until thefirst failure.If any mixture fails any of the primary tests,thegreases are incompatible.If all mixtures pass the three primarytests,the greases are considered compatible.1.4 This practice applies only to lubricating greases havingcharacteristics suitable for evaluation by the suggested testmethods.If the scope of a specific test method limits testing tothose greases within a specified range of properties,greasesoutside that range cannot be tested for compatibility by that testmethod.An exception to this would be when the testedproperty of the neat,constituent greases is within the specifiedrange,but the tested property of a mixture is outside the rangebecause of incompatibility.1.5 This practice does not purport to cover all test methodsthat could be employed.1.6 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.7 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 safety information,see 7.2.3.1.8 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:2D217 Test Methods for Cone Penetration of LubricatingGreaseD566 Test Method for Dropping Point of Lubricating GreaseD972 Test Method for Evaporation Loss of LubricatingGreases and OilsD1092 Test Method for Measuring Apparent Viscosity ofLubricating GreasesD1263 Test Method for Leakage Tendencies of AutomotiveWheel Bearing Greases(Withdrawn 2010)3D1264 Test Method for Determining the Water WashoutCharacteristics of Lubricating GreasesD1403 Test Methods for Cone Penetration of LubricatingGrease Using One-Quarter and One-Half Scale ConeEquipmentD1478 Test Method for Low-Temperature Torque of BallBearing GreaseD1742 Test Method for Oil Separation from LubricatingGrease During StorageD1743 Test Method for Determining Corrosion PreventiveProperties of Lubricating GreasesD1831 Test Method for Roll Stability of Lubricating GreaseD2265 Test Method for Dropping Point of LubricatingGrease Over Wide Temperature Range1This practice is under the jurisdiction of ASTM Committee D02 on PetroleumProducts,Liquid Fuels,and Lubricants and is the direct responsibility of Subcom-mittee D02.G0.01 on Chemical and General Laboratory Tests.Current edition approved Dec.15,2017.Published February 2018.Originallyapproved in 1997.Last previous edition approved in 2011 as D6185 11.DOI:10.1520/D6185-11R17.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright 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.1 D2266 Test Method for Wear Preventive Characteristics ofLubricating Grease(Four-Ball Method)D2509 Test Metho