ASTM_D_6082_-_12.pdf

Designation:D608212Standard 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 describes the procedure for determin-ing the foaming characteristics of lubricating oils(specificallytransmission fluid and motor oil)at 150C.1.2 Foaming characteristics of lubricating oils at tempera-tures up to 93.5C are determined by Test Method D892 or IP146.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 WARNINGMercury has been designated by manyregulatory agencies as a hazardous material that can causecentral nervous system,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.htmfor addi-tional information.Users should be aware that selling mercuryand/or mercury containing products into your state or countrymay be prohibited by law.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 and health practices and determine the applica-bility of regulatory limitations prior to use.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 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.3.1.5.1 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 surface tension effects)to the1This 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 Jan.1,2012.Published March 2012.Originallyapproved in 1997.Last previous edition approved in 2011 as D608211.DOI:10.1520/D6082-12.2For 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 States1 largest pore of the diffuser under consideration.The poredimension is expressed in micrometers(m).3.1.7 permeability,n in gas diffusion,the rate of asubstance that passes through a material(diffuser)under givenconditions.3.2 Definitions of Terms Specific to This Standard:3.2.1 bottom volume,nthe volume of liquid sample,thatis,sample substantially free of air,at any given time during thetest.3.2.2 collapse time,nin foam testing,the time in seconds,for zero foam to appear after the air is disconnected at the endof the five minute air blowing time.3.2.3 dynamic bubble,nthe first bubble to pass throughand escape