ASTM_D_6184_-_14.pdf

Designation:D618414Standard Test Method forOil Separation from Lubricating Grease(Conical SieveMethod)1This standard is issued under the fixed designation D6184;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.INTRODUCTIONThe conical sieve method for measuring leakage from lubricating grease(commonly known as thecone bleed test)uses the same equipment as the now obsolete and withdrawn Federal Test Method(FTM)791C Method 321.3,Oil Separation from Lubricating Grease(Static Technique).Despite thelack of a precision statement,Method 321.3 had been used for many years in military and industrialgrease specifications to determine fluid separation tendencies from greases.Test Method D6184overcomes the deficiencies of Method 321.3.It reflects the procedures and precision determinationsused in a cooperative study in Subcommittee D02.G0 of Committee D02 and supersedes the FTMmethod.1.Scope1.1 This test method covers the determination of the ten-dency of lubricating grease to separate oil at an elevatedtemperature.This test method shall be conducted at 100C for30 h unless other conditions are required by the greasespecification.1.2 This test method is suitable for use with most allgreases,but the test precision was established using greaseshaving a worked penetration(Test Methods D217)greater than220(NLGI No.3 grade)and less than 340(NLGI No.1 grade).1.3 The values stated in SI units are to be regarded asstandard.The term 60 mesh was originally described in thenow withdrawn E437 standard.It is used to describe the wiremesh because there is no exact metric equivalent.1.4 This standard does not purport to address all the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 safetypractices and determine the applicability of regulatory limita-tions prior to use.2.Referenced Documents2.1 ASTM Standards:2D217 Test Methods for Cone Penetration of LubricatingGreaseD1742 Test Method for Oil Separation from LubricatingGrease During StorageE437 Specification for Industrial Wire Cloth and Screens(Square Opening Series)(Discontinued 2000)Replacedby E 2016(Withdrawn 2000)32.2 Withdrawn Government Standard:Federal Test Method(FTM)791C Method 321.3,OilSeparation from Lubricating Greases(Static Method)Withdrawn 200743.Terminology3.1 Definitions:3.1.1 lubricating grease,na semifluid to solid product ofa dispersion of a thickener in a liquid lubricant.3.1.1.1 DiscussionThe dispersion of the thickener forms atwo-phase system and immobilizes the liquid lubricant by1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.G0.03 on Physical TestsCurrent edition approved Dec.1,2014.Published February 2015.Originallyapproved in 1997.Last previous edition approved in 2005 as D6184 98(2005),which was withdrawn in July 2014 and reinstated in December 2014.DOI:10.1520/D6184-14.2For 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.4Available from Standardization Documents Order Desk,Bldg.4 Section D,700Robbins Ave.,Philadelphia,PA 19111-5094,Attn:NPODS.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 surface tension and other physical forces.Other ingredientsimparting special properties are often included.D2173.1.2 oil separation,nthe appearance of a liquid fractionfrom an otherwise homogeneous lubricating composition.D17423.1.3 thickener,nin a lubricating grease,a substancecomposed of finely divided particles dispersed in a liquidlubricant to form the products structure.3.1.3.1 DiscussionThe thickener can be fibers(such asvarious metallic soaps)or plates or spheres(such as certainnon-soap thickeners)which are insoluble or,at most,only veryslightly soluble in the liquid lubricant.The general require-ments are that the solid particles be extremely small,uniformlydispersed,and capable of forming a relatively stable,gel-likestructure with the liquid lubricantD2174.Summary of Test Method4.1 The weighed sample is placed in a cone-shaped,wire-cloth sieve,suspended in a beaker,then heated under staticconditions for the specified time and temperature.Unlessotherwise required by the grease specification,the sample istested at standard conditions of 100 6 0.5C for 30 6 0.25 h.The separated oil is weighed and reported as a percentage ofthe m