ASTM_D_6082_-_22.pdf

Designation:D608222Standard Test Method forHigh Temperature Foaming Characteristics of LubricatingOils1This standard is issued under the fixed designation D6082;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.Scope*1.1 This test method covers the procedure for determiningthe foaming characteristics of lubricating oils(specificallytransmission fluid and motor oil)at 150 C.1.2 Foaming characteristics of lubricating oils at tempera-tures up to 93.5 C are determined by Test Method D892 or IP146.1.3 The values stated in SI units are to be regarded asstandard.1.3.1 ExceptionThe values given in parentheses are pro-vided for information only.1.4 WARNINGMercury has been designated by manyregulatory agencies as a hazardous substance that can causeserious medical issues.Mercury,or its vapor,has been dem-onstrated to be hazardous to health and corrosive to materials.Use caution when handling mercury and mercury-containingproducts.See the applicable product Safety Data Sheet(SDS)for additional information.The potential exists that sellingmercury or mercury-containing products,or both,is prohibitedby local or national law.Users must determine legality of salesin their location.1.5 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 regulatory limitations prior to use.1.6 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,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D892 Test Method for Foaming Characteristics of Lubricat-ing OilsE128 Test Method for Maximum Pore Diameter and Perme-ability of Rigid Porous Filters for Laboratory UseE1272 Specification for Laboratory Glass Graduated Cylin-ders2.2 Energy Institute Standards:3IP 146 Standard Method of Test for Foaming Characteristicsof Lubricating Oils3.Terminology3.1 Definitions:3.1.1 diffuser,nfor gas,a device for dispersing gas into aliquid(Test Method D892).3.1.1.1 DiscussionAlthough diffusers can be made ofeither metallic or non-metallic materials,in this test method thediffuser is sintered stainless steel.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 on a volumetric basis.3.1.2.1 DiscussionThe air(or gas)is in the form ofdiscrete bubbles of about 10 m to 1000 m in diameter.Thebubbles are not uniformly dispersed.In time,they rise to thesurface to coalesce to form larger bubbles which break or formfoam.Subsurface coalescence can also occur,in which case,the bubbles will rise more rapidly.3.1.3 foam,nin liquids,a collection of bubbles formed inor on the surface of a liquid in which the air or gas is the majorcomponent on a volumetric basis.3.1.4 gas,na fluid(such as air)that has neither indepen-dent shape nor volume but tends to expand indefinitely.3.1.5 lubricant,nany material interposed between twosurfaces that reduces friction or wear between them.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 Nov.1,2022.Published November 2022.Originallyapproved in 1997.Last previous edition approved in 2017 as D6082 12(2017).DOI:10.1520/D6082-22.2For 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.3Available from Energy Institute,61 New Cavendish St.,London,WIG 7AR,U.K.,http:/www.energyinst.org.uk.*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 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.13.1.5.1 DiscussionIn this test method,the lubricant is anoil which may or may not contain additives such as foaminhibitors.3.1.6 maximum pore diameter,nin gas diffusion,thediameter of a capillary of circular cross-section which isequivalent(with respect to sur