1、Designation:D404906(Reapproved 2011)Standard Test Method forDetermining the Resistance of Lubricating Grease to WaterSpray1This standard is issued under the fixed designation D4049;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the
2、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 test method2covers the ability of a grease to adhereto a metal surface when subjected to a water spray underpr
3、escribed laboratory conditions.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.3 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 st
4、andard 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:3D217 Test Methods for Cone Penetration of LubricatingGreaseD1742 Test Method for Oil Separation from LubricatingGrease During
5、 StorageE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Terminology3.1 Definitions:3.1.1 lubricating grease,na semi-fluid to solid product ofa thickener in a liquid lubricant.3.1.1.1 DiscussionThe dispersion of the thickener forms atwo-phase system a
6、nd immobilizes the liquid by surfacetension and other physical forces.Other ingredients are com-monly included to impart special properties.D2173.1.2 oil separation,nthe appearance of a liquid fractionfrom an otherwise homogeneous lubricating composition.D17423.1.3 thickener,nin lubricating grease,a
7、 substance com-posed of finely divided particles dispersed in a liquid lubricantto form the products structure.3.1.3.1 DiscussionThe thickeners can be fibers(such asvarious metallic soaps)or plates or spheres(such as certainnon-soap thickeners),which are insoluble or,at most,only veryslightly solubl
8、e 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 lubricant.D2174.Summary of Test Method4.1 The grease to be tested is coated on a stainless steelpanel an
9、d sprayed with water at the specified test temperatureand pressure.The amount of grease remaining on the panelafter 5 min 6 15 s is a measure of the resistance of the greaseto water spray.5.Significance and Use5.1 This test method is used to evaluate the ability of agrease to adhere to a metal surfa
10、ce when subjected to directwater spray.The results obtained from the use of this testmethod suggest correlation in operations involving direct waterspray impingement such as steel mill roll neck bearing ser-vice.4This test method is used for quality control and purchasespecifications.6.Apparatus56.1
11、 Stainless Steel Test Panel,18-8(chromium-nickel)stainless steel,as shown in Fig.1.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.G0.06 on Functional Tests-Contamination.Current ed
12、ition approved Oct.1,2011.Published October 2011.Originallyapproved in 1981.Last previous edition approved in 2006 as D4049-06.DOI:10.1520/D4049-06R11.2The development of this test method is described in Musilli,T.G.,“WaterSpray-Off Characteristics of Lubricating Grease,”NLGI Spokesman,December1982,
13、pp.323326.3For 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.4A.E.Cichelli,“Evaluation of Greases for Steel Mill Serv
14、ice,”NLGISpokesman,August 1973,and A.E.Cichelli,“Grease Lubrication in Steel Millswith Emphasis on Roll Neck Bearings,”NLGI Spokesman,April 1980.5The sole source of supply of the apparatus known to the committee at this timeis Koehler Instrument Co.,Inc.,1595 Sycamore Ave.,Bohemia,NY 11716.If youare
15、 aware of alternative suppliers,please provide this information to ASTMInternational Headquarters.Your comments will receive careful consideration at ameeting of the responsible technical committee,1which you may attend.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken
16、,PA 19428-2959.United States1 6.1.1 Grease Application Jig,for applying grease to panel;Fig.2.6.2 Water Spray Apparatus,as shown in Fig.3.6.3 Spray Nozzle,as shown in Fig.4.6.4 Thermometer or Thermocouple,capable of measuring38 6 0.5C,to determine the temperature of the water spray,positioned to prevent breaking the spray pattern.7.Reagents and Materials7.1 Purity of ReagentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it is intended thatall reagents shall conform
