ASTM D6082-06

Standard Test Method for High Temperature Foaming Characteristics of Lubricating Oils

SIGNIFICANCE AND USE
The tendency of oils to foam at high temperature can be a serious problem in systems such as high-speed gearing, high volume pumping, and splash lubrication. Foaming can cause inadequate lubrication, cavitation, and loss of lubricant due to overflow, and these events can lead to mechanical failure.
Correlation between the amount of foam created or the time for foam to collapse, or both, and actual lubrication failure has not been established. Such relations should be empirically determined for foam sensitive applications.
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 D 892 or IP 146.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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.

General Information

• Status: Historical
• Publication Date: 31-Jul-2006
• ICS: 75.100 - Lubricants, industrial oils and related products
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.06 - Analysis of Liquid Fuels and Lubricants

Relations

• Replaces: ASTM D6082-01 - Standard Test Method for High Temperature Foaming Characteristics of Lubricating Oils
• Effective Date: 01-Aug-2006
• Replaced By: ASTM D6082-11 - Standard Test Method for High Temperature Foaming Characteristics of Lubricating Oils
• Effective Date: 01-Jul-2011
• Referred By: ASTM D4485-22e1 - Standard Specification for Performance of Active API Service Category Engine Oils
• Effective Date: 01-Aug-2006
• Referred By: ASTM D892-18e1 - Standard Test Method for Foaming Characteristics of Lubricating Oils
• Effective Date: 01-Aug-2006

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D6082–06
Standard Test Method for
High Temperature Foaming Characteristics of Lubricating
1
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* 3.1.1 diffuser, n—for gas, a device for dispersing gas into a
liquid (Test Method D892).
1.1 This test method describes the procedure for determin-
3.1.1.1 Discussion—Although diffusers can be made of
ing the foaming characteristics of lubricating oils (specifically
eithermetallicornon-metallicmaterials,inthistestmethodthe
transmission fluid and motor oil) at 150°C.
diffuser is sintered stainless steel.
1.2 Foaming characteristics of lubricating oils at tempera-
3.1.2 entrained air (or gas), n—in liquids, a two-phase
tures up to 93.5°C are determined by Test Method D892 or
mixture of air (or gas) dispersed in a liquid in which the liquid
IP146.
is the major component on a volumetric basis.
1.3 The values stated in SI units are to be regarded as
3.1.2.1 Discussion—The air (or gas) is in the form of
standard. No other units of measurement are included in this
discrete bubbles of about 10 to 1000 µm in diameter. The
standard.
bubbles are not uniformly dispersed. In time, they rise to the
1.4 This standard does not purport to address all of the
surfacetocoalescetoformlargerbubbleswhichbreakorform
safety concerns, if any, associated with its use. It is the
foam. Subsurface coalescence can also occur, in which case,
responsibility of the user of this standard to establish appro-
the bubbles will rise more rapidly.
priate safety and health practices and determine the applica-
3.1.3 foam, n—in liquids, a collection of bubbles formed in
bility of regulatory limitations prior to use.
oronthesurfaceofaliquidinwhichtheairorgasisthemajor
2. Referenced Documents
component on a volumetric basis.
2
3.1.4 gas, n—a fluid (such as air) that has neither indepen-
2.1 ASTM Standards:
dent shape nor volume but tends to expand indefinitely.
D892 TestMethodforFoamingCharacteristicsofLubricat-
3.1.5 lubricant, n—any material interposed between two
ing Oils
surfaces that reduces friction or wear between them.
E1 Specification for ASTM Liquid-in-Glass Thermometers
3.1.5.1 Discussion—In this test method, the lubricant is an
E128 Test Method for Maximum Pore Diameter and Per-
oil which may or may not contain additives such as foam
meability of Rigid Porous Filters for Laboratory Use
inhibitors.
E1272 Specification for Laboratory Glass Graduated Cylin-
3.1.6 maximum pore diameter, n—in gas diffusion, the
ders
3
diameter of a capillary of circular cross-section which is
2.2 Energy Institute Standards:
equivalent (with respect to surface tension effects) to the
IP146 StandardMethodofTestforFoamingCharacteristics
largest pore of the diffuser under consideration. The pore
of Lubricating Oils
dimension is expressed in micrometers (µm).
3. Terminology
3.1.7 permeability, n—in gas diffusion, the rate of a sub-
stance that passes through a material (diffuser) under given
3.1 Definitions:
conditions.
3.2 Definitions of Terms Specific to This Standard:
1
This test method is under the jurisdiction of ASTM Committee D02 on
3.2.1 bottom volume—the volume of liquid sample, that is,
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
sample substantially free of air, at any given time during the
D02.06 on Analysis of Lubricants.
Current edition approved Aug. 1, 2006. Published September 2006. Originally test.
approved in 1997. Last previous edition approved in 2001 as D6082–01. DOI:
3.2.2 collapse time, n—in foam testing,thetimeinseconds,
10.1520/D6082-06.
for zero foam to appear after the air is disconnected at the end
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
of the five minute air blowing time.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3
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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D6082–06
FIG. 1 Terminology Diagram
3.2.3 dynamic bubble, n—the first bubble to pass through 3.2.7 percent volume increase, n—in foam testing, the
and escape from the diffuser followed by a continuous succes- increaseintotalvolumeexpressedasapercentageoftheinitial
...