ASTM_D_6185_-_11.pdf

Designation:D618511Standard 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 000stroke 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 the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this standard to establish appropriate safety andpractices and determine the applicability of regulatory limita-tions prior to use.For specific safety information,see 7.2.3.2.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 RangeD2266 Test Method for Wear Preventive Characteristics ofLubricating Grease(Four-Ball Method)D2509 Test Method for Measurement of Load-CarryingCapacity of Lubricating Grease(Timken Method)D2595 Test Method for Evaporation Loss of LubricatingGreases Over Wide-Temperature RangeD2596 Test Method for Measurement of Extreme-Pressure1This 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 July 1,2011.Published August 2011.Originallyapproved in 1997.Last previous edition approved in 2010 as D618510.DOI:10.1520/D6185-11.2For 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 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 States1 Properties of Lubricating Grease(Four-Ball Method)D3336 Test Method for Life of Lubricating Greases in BallBearings at Elevated TemperaturesD3337 Test Method for Determining Life and Torque ofLubricating Greases in Small Ball Bearings(Withdrawn2009)3D3527 Test Method for Life Performance of AutomotiveWheel Bearing GreaseD4049 Test Method for Determining the Resistance ofLubricating Grease to Water SprayD4170 Test Method for Fretting Wear Protection by Lubri-ca