1、Designation:D89218British Standard 5092Designation:146/2000Standard Test Method forFoaming Characteristics of Lubricating Oils1This standard is issued under the fixed designation D892;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,t
2、he 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.1.Scope*1.1 This test method covers th
3、e determination of the foam-ing characteristics of lubricating oils at 24 C and 93.5 C.Means of empirically rating the foaming tendency and thestability of the foam are described.1.2 WARNINGMercury has been designated by manyregulatory agencies as a hazardous material that can causecentral nervous s
4、ystem,kidney and liver damage.Mercury,orits vapor,may be hazardous to health and corrosive tomaterials.Caution should be taken when handling mercury andmercury containing products.See the applicable product Ma-terial Safety Data Sheet(MSDS)for details and EPAswebsitehttp:/www.epa.gov/mercury/faq.htm
5、for addi-tional information.Users should be aware that selling mercuryand/or mercury containing products into your state or countrymay be prohibited by law.1.3 The values stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only
6、and are not considered standard.1.4 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 regulato
7、ry limitations prior to use.For specific warning statements,see Sections 7,8,and 9.1.1.1.5 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,G
8、uides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids(and Calculation of Dynamic Viscos-ity)D6082 Test Method for High Temperature
9、Foaming Charac-teristics of Lubricating OilsE1 Specification for ASTM Liquid-in-Glass ThermometersE128 Test Method for Maximum Pore Diameter and Perme-ability of Rigid Porous Filters for Laboratory UseE1272 Specification for Laboratory Glass Graduated Cylin-ders3.Terminology3.1 Definitions:3.1.1 dif
10、fuser,nfor gas,a device for dispersing gas into afluid.3.1.1.1 DiscussionIn this test method the diffuser may bemade of either metallic or non-metallic materials.3.1.2 entrained air(or gas),nin liquids,a two-phasemixture of air(or gas)dispersed in a liquid in which the liquidis the major component o
11、n a volumetric basis.3.1.2.1 DiscussionEntrained air(or gas)may form microsize bubbles in liquids that are not uniformly dispersed and thatmay coalesce to form larger bubbles below or at the surfacewhich break or form foam.3.1.3 foam,nin liquids,a collection of bubbles formed inor on the surface of
12、a liquid in which the air or gas is the majorcomponent on a volumetric basis.3.1.4 lubricant,nany material interposed between twosurfaces that reduces friction or wear between them.D60823.1.4.1 DiscussionIn this test method,the lubricant is anoil which may or may not contain additives such as foamin
13、hibitors.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.06 on Analysis of Liquid Fuels and Lubricants.Current edition approved April 15,2018.Published May 2018.Originallyapproved i
14、n 1946.Last previous edition approved in 2013 as D892 131.DOI:10.1520/D0892-18.In the IP,this test method is under the jurisdiction of the StandardizationCommittee.This test method has been approved by the sponsoring committees andaccepted by the cooperating societies in accordance with established
15、procedures.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.*A Summary of Changes section appears at the end of thi
16、s standardCopyright 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 3.1.5 maximum pore diameter,nin gas diffusion,thediameter of a cir
