Standard Test Method for Oxidation Characteristics of Inhibited Mineral Oils

SCOPE
1.1 This test method is used to evaluate the oxidation stability of inhibited steam-turbine oils in the presence of oxygen, water, and copper and iron metals at an elevated temperature. The test method is also used for testing other oils such as hydraulic oils and circulating oils having a specific gravity less than that of water and containing rust and oxidation inhibitors.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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. For specific precautionary statements, see Section 6.

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Publication Date
09-Aug-2002
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ASTM D943-02 - Standard Test Method for Oxidation Characteristics of Inhibited Mineral Oils
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
An American National Standard
Designation: D 943 – 02 British Standard 4388
Standard Test Method for
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Oxidation Characteristics of Inhibited Mineral Oils
This standard is issued under the fixed designation D 943; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope D 4057 Practice for Manual Sampling of Petroleum and
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Petroleum Products
1.1 This test method is used to evaluate the oxidation
D 4310 Test Method for Determination of the Sludging and
stability of inhibited steam-turbine oils in the presence of
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Corrosion Tendencies of Inhibited Mineral Oils
oxygen, water, and copper and iron metals at an elevated
D 5770 Test Method for Semi-Quantitative Micro Determi-
temperature. The test method is also used for testing other oils
7
nation of Acid Number of Used Lubricating Oils
such as hydraulic oils and circulating oils having a specific
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E 1 Specification for ASTM Thermometers
gravity less than that of water and containing rust and oxidation
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2.2 IP Standards:
inhibitors.
Specifications for IP Standard Thermometers
1.2 The values stated in SI units are to be regarded as the
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2.3 British Standard:
standard. The values given in parentheses are for information
BS 1829
only.
1.3 This standard does not purport to address all of the
3. Summary of Test Method
safety concerns, if any, associated with its use. It is the
3.1 The oil sample is contacted with oxygen in the presence
responsibility of the user of this standard to establish appro-
of water and an iron-copper catalyst at 95°C. The test continues
priate safety and health practices and determine the applica-
until the measured acid number of the oil is 2.0 mg KOH/g or
bility of regulatory limitations prior to use. For specific
above. The number of test hours required for the oil to reach
precautionary statements, see Section 6.
2.0 mg KOH/g is the “oxidation lifetime.”
2. Referenced Documents
4. Significance and Use
2.1 ASTM Standards:
4.1 This test method is widely used for specification pur-
A 510 Specification for General Requirements for Wire
2 poses and is considered of value in estimating the oxidation
Rods and Coarse Round Wire, Carbon Steel
3 stability of lubricants, especially those that are prone to water
B 1 Specification for Hard-Drawn Copper Wire
contamination. It should be recognized, however, that correla-
D 664 Test Method for Acid Number of Petroleum Products
4 tion between results of this method and the oxidation stability
by Potentiometric Titration
5 of a lubricant in field service may vary markedly with field
D 1193 Specification for Reagent Water
service conditions and with various lubricants. The precision
D 3244 Practice for Utilization of Test Data to Determine
6 statement for this method was determined on steam turbine
Conformance with Specifications
oils.
D 3339 Test Method for Acid Number of Petroleum Prod-
6
ucts by Semi-Micro Color Indicator Titration
NOTE 1—Furthermore, in the course of testing a lubricant by this
method, other signs of deterioration, such as sludge formation or catalyst
coil corrosion, may appear that are not reflected in the calculated oxidation
1
This test method is under the jurisdiction of ASTM Committee D02 on
lifetime. The subcommittee responsible for this method is investigating
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
the application of alternative criteria for evaluation of lubricants using this
D02.09 on Oxidation.
Current edition approved August 10, 2002. Published October 2002. Originally
published as D 943–47. Last previous edition D 943–99.
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In 1976, this test method ceased to be a joint ASTM-IP standard. Annual Book of ASTM Standards, Vol 05.03.
2 8
Annual Book of ASTM Standards, Vol 01.03. Annual Book of ASTM Standards, Vol 14.03.
3 9
Annual Book of ASTM Standards, Vol 02.03. Available from the Institute of Petroleum, 61 New Cavendish St., London,
4
Annual Book of ASTM Standards, Vol 05.01. W1G 7AR, United Kingdom.
5 10
Annual Book of ASTM Standards, Vol 11.01. Available from British Standards Institute, 389 Chiswick High Rd., London,
6
Annual Book of ASTM Standards, Vol 05.02. W4 4AL, United Kingdom.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D943–02
All dimensions are in millimetres (inches)
Notes: 1. The oxidation test tube has a calibration line at 300 mL. This calibration applies to the test tube alone at 20°C.
2. Open tube ends
...

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