ASTM D6082-12

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D6082–11 Designation:D6082–12
Standard Test Method for
High Temperature Foaming Characteristics of Lubricating
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Oils
This standard is issued under the fixed designation D6082; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This test method describes the procedure for determining the foaming characteristics of lubricating oils (specifically
transmission fluid and motor oil) at 150°C.
1.2 Foaming characteristics of lubricating oils at temperatures up to 93.5°C are determined by Test Method D892 or IP 146.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 WARNING—Mercury has been designated by many regulatory agencies as a hazardous material that can cause central
nervous system, kidney and liver damage. Mercury, or its vapor, may be hazardous to health and corrosive to materials. Caution
should be taken when handling mercury and mercury containing products. See the applicable product Material Safety Data Sheet
(MSDS) for details and EPA’s website—http://www.epa.gov/mercury/faq.htm—for additional information. Users should be aware
that selling mercury and/or mercury containing products into your state or country may be prohibited by law.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
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2.1 ASTM Standards:
D892 Test Method for Foaming Characteristics of Lubricating Oils E1Specification forASTM Liquid-in-Glass Thermometers
E128 Test Method for Maximum Pore Diameter and Permeability of Rigid Porous Filters for Laboratory Use
E1272 Specification for Laboratory Glass Graduated Cylinders
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2.2 Energy Institute Standards:
IP 146 Standard Method of Test for Foaming Characteristics of Lubricating Oils
3. Terminology
3.1 Definitions:
3.1.1 diffuser, n—for gas, a device for dispersing gas into a liquid (Test Method D892).
3.1.1.1 Discussion—Althoughdiffuserscanbemadeofeithermetallicornon-metallicmaterials,inthistestmethodthediffuser
is sintered stainless steel.
3.1.2 entrained air (or gas), n—in liquids, a two-phase mixture of air (or gas) dispersed in a liquid in which the liquid is the
major component on a volumetric basis.
3.1.2.1 Discussion—The air (or gas) is in the form of discrete bubbles of about 10 to 1000 µm in diameter.The bubbles are not
uniformly dispersed. In time, they rise to the surface to coalesce to form larger bubbles which break or form foam. Subsurface
coalescence can also occur, in which case, the bubbles will rise more rapidly.
3.1.3 foam, n—in liquids, a collection of bubbles formed in or on the surface of a liquid in which the air or gas is the major
component on a volumetric basis.
3.1.4 gas, n—a fluid (such as air) that has neither independent shape nor volume but tends to expand indefinitely.
3.1.5 lubricant, n—any material interposed between two surfaces that reduces friction or wear between them.
3.1.5.1 Discussion—Inthistestmethod,thelubricantisanoilwhichmayormaynotcontainadditivessuchasfoaminhibitors.
3.1.6 maximum pore diameter, n—in gas diffusion,thediameterofacapillaryofcircularcross-sectionwhichisequivalent(with
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This test method is under the jurisdiction ofASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D02.06 on
Analysis of Lubricants.
Current edition approved JulyJan. 1, 2011.2012. Published August 2011.March 2012. Originally approved in 1997. Last previous edition approved in 20062011 as
D6082–06.D6082–11. DOI: 10.1520/D6082-112.
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ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
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Available 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 standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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