1、Designation:D126412Standard Test Method forDetermining the Water Washout Characteristics ofLubricating Greases1This standard is issued under the fixed designation D1264;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last
2、 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.1.Scope*1.1 This test method covers the evaluation of
3、 the resistanceof a lubricating grease to washout by water from a bearing,when tested at 38 and 79C(100 and 175F)under theprescribed laboratory conditions.It is not to be considered theequivalent of service evaluation tests.Precision and bias wasdetermined using grease ranging from NLGI 3 to 0 grade
4、s inthe research report(see Section 10).1.2 This test method may not be suitable for some greasescontaining highly volatile components.This test method doesnot attempt to account for sample evaporation.It is the usersresponsibility to determine if evaporation of the sample is asignificant contributo
5、r to mass loss at the required dryingtemperature.1.3 The values state in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility o
6、f the user this standard to establish appropriatesafety and health practices and determine the applicability ofregulatory limitations prior to use.For specific warningstatements,see 6.3.2.Referenced Documents2.1 ASTM Adjuncts:Standard Ball Bearing2D2PP,Version 4.43,Determination of Precision and Bia
7、sData for Use in Test Methods for Petroleum Products33.Summary of Test Method3.1 The grease is packed into a ball bearing,the bearing isthen inserted in a housing with specified clearances,androtated at 600 6 30 rpm.Water,controlled at the specified testtemperature,impinges on the bearing housing at
8、 a rate of 5 60.5 mL/s.The amount of grease washed out in 60 6 1 min isa measure of the resistance of the grease to water washout.4.Significance and Use4.1 This test method estimates the resistance of greases towater washout from ball bearings under conditions of the test.No correlation with field s
9、ervice has been established.5.Apparatus5.1 Ball Bearing,ASTM test bearing size 6204(seeADJD3336.25.2 Bearing Housing and Shield with dimensions as shownin Fig.1.5.3 Reservoir,Bearing-Housing Mount,Circulating Pump,and Drive Motor,similar or equivalent to those shown in Fig.1.5.4 Heating Source,to ma
10、intain the water temperature at38C 6 1.7C(100F 6 3F)or 79C 6 1.7C(174F 6 3F).NOTE1Suitable temperature control may be obtained by the use ofimmersion heaters,steam coils,or infrared heat lamps,in conjunction withtransformers or thermostats.5.5 Thermometer or Thermocouple,to determine the tem-peratur
11、e of the water reservoir.6.Materials and Reagents6.1 Purity of ReagentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it is intended that1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibilit
12、y of SubcommitteeD02.G0.06 on Functional Tests-Contamination.Current edition approved Dec.1,2012.Published March 2013.Originallyapproved in 1953.Last previous edition approved in 2011 as D126411.DOI:10.1520/D1264-12.2Available from ASTM International Headquarters.Order Adjunct No.ADJD3336.Original a
13、djunct produced in 1984.3ADJD6300 is no longer available.*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 in.mmin.mmFC0.0100.250.87522.22100 338 1.70.0150.380.93823.81174 379
14、 1.70.0310.7921457.1183.1861525323.973164.76146.35FIG.1 Water Washout Characteristics of Lubricating Grease ApparatusD1264 122 all reagents shall conform to the specifications of the commit-tee on Analytical Reagents of the American Chemical Society,where such specifications are available.4Other gra
15、des may beused,provided it is first ascertained that the reagent is ofsufficiently high purity to permit its use without lessening theaccuracy of the determination.6.2 Distilled Water.6.3 Cleaning SolventCapable of sufficiently cleaning thetest bearing for use in the test.Either reagent grade Stodda
16、rdsolvent,also known as Mineral Spirits,(WarningCombustible.Vapor harmful),or American Chemical Societyreagent grade n-heptane4(WarningFlammable.Harmful ifinhaled)has been found suitable for use.7.Preparation of Apparatus7.1 Clean the reservoir and water passages by flushing withdistilled water.Wipe off any oil scum which has been depositedon the surfaces of the reservoir.Clean the test bearing withcleaning solvent(see 6.3).8.Procedure8.1 Pack the tared bearing with 4.00 6 0.05 g of test grease.
