ASTM D2893-04(2009)
(Test Method)Standard Test Method for Oxidation Characteristics of Extreme-Pressure Lubrication Oils
Standard Test Method for Oxidation Characteristics of Extreme-Pressure Lubrication Oils
SIGNIFICANCE AND USE
These test methods have been widely used to measure the oxidation stability of extreme pressure lubricating fluids, gear oils, and mineral oils.
SCOPE
1.1 These test methods (A and B) cover the determination of the oxidation characteristics of extreme-pressure fluid lubricants, gear oils, or mineral oils.
Note 1—The changes in the lubricant resulting from these test methods are not always necessarily associated with oxidation of the lubricant. Some changes may be due to thermal degradation.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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.
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D2893 − 04(Reapproved 2009)
Standard Test Methods for
Oxidation Characteristics of Extreme-Pressure Lubrication
1
Oils
This standard is issued under the fixed designation D2893; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.2 The oil is then tested for precipitation number and
increase in kinematic viscosity.
1.1 Thesetestmethods(AandB)coverthedeterminationof
the oxidation characteristics of extreme-pressure fluid
4. Significance and Use
lubricants, gear oils, or mineral oils.
4.1 These test methods have been widely used to measure
NOTE1—Thechangesinthelubricantresultingfromthesetestmethods the oxidation stability of extreme pressure lubricating fluids,
are not always necessarily associated with oxidation of the lubricant.
gear oils, and mineral oils.
Some changes may be due to thermal degradation.
5. Apparatus
1.2 The values stated in SI units are to be regarded as
5.1 Heating Bath or Block, thermostatically controlled,
standard. No other units of measurement are included in this
capable of maintaining the oil sample in the test tube at a
standard.
temperature of 95 6 0.2°C (Test Method A), or 121 6 1.0°C
1.3 This standard does not purport to address all of the
(Test Method B) and large enough to hold the desired number
safety concerns, if any, associated with its use. It is the
of oxidation cells immersed in the heating bath or block to a
responsibility of the user of this standard to establish appro-
depth of approximately 350 mm. The liquid heating bath shall
priate safety and health practices and determine the applica-
be fitted with a suitable stirring device to provide a uniform
bility of regulatory limitations prior to use.
temperature throughout the bath.
5.2 Test Tubes, of borosilicate glass, 41 6 0.5 mm inside
2. Referenced Documents
diameter and 600 mm in length are required, each fitted with a
2
2.1 ASTM Standards:
slotted cork (Note 2) stopper into which shall be inserted a
D91 Test Method for Precipitation Number of Lubricating
glass air delivery tube of 4 to 5 mm of inside diameter. The
Oils
length of the air delivery tube shall be such that one end
D445 Test Method for Kinematic Viscosity of Transparent
reaches to within 6 mm of the bottom of the tube and the other
and Opaque Liquids (and Calculation of Dynamic Viscos-
end projects 60 to 80 mm from the cork stopper.
ity)
NOTE 2—New corks should be used for each run.
D943 Test Method for Oxidation Characteristics of Inhibited
Mineral Oils
5.3 Flowmeter, one to each test tube, capable of measuring
E1 Specification for ASTM Liquid-in-Glass Thermometers an air flow of 10 L/h with an accuracy of 60.5 L/h.
5.4 Thermometer—ASTM Solvent Distillation Thermom-
3. Summary of Test Method
eter having a range from 76 to 126°C and conforming to the
3.1 The oil sample is subjected to a temperature of 95°C requirement for Thermometer 40C as prescribed in Specifica-
(Test Method A) or 121°C (Test Method B) in the presence of tion E1. Alternatively, calibrated thermocouples may be used.
dry air for 312 h.
5.5 Air Supply—Oil-free, dried air at constant pressure shall
be supplied to each flowmeter.
5.6 AirDryer—Before being supplied to the flowmeters, the
1
These test methods are under the jurisdiction of ASTM Committee D02 on
air shall be passed through a drying tower packed with
Petroleum Products and Lubricantsand is the direct responsibility of Subcommittee
indicating grade of anhydrous calcium sulfate or equivalent.
D02.09.0D on Oxidation of Lubricants.
The quantity of dessicant should be sufficient to last for the
Current edition approved Oct. 1, 2009. Published November 2009. Originally
approved in 1970. Last previous edition approved in 2004 as D2893–04. DOI:
entire test.
10.1520/D2893-04R09.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6. Preparation of Apparatus
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.1 Cleaning of Oxidation Cells—Clean glassware with a
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. suitable cleaning solution. (Warning—Causes severe burns.A
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D2893 − 04 (2009)
recognized carcinogen. Strong oxidizer, contact with other
material may cause fire. Hygroscropic.)
NOTE 3—While other suitable cleaning solutions are now available, the
round robin used glassware cleaned with chromic acid. Other cleaning
solutions such as NoChromix and M
...
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