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ASTM D5763-95

(Test Method)

Standard Test Method for Oxidation and Thermal Stability Characteristics of Gear Oils Using Universal Glassware

Standard Test Method for Oxidation and Thermal Stability Characteristics of Gear Oils Using Universal Glassware

SCOPE
1.1 This test method overs the determination of the oxidation characteristics of extreme pressure and non-extreme pressure gear oils and includes the quantitative determination of total sludge, viscosity change, and oil loss.
Note 1—While the round-robin tests used ISO VG 220 extreme pressure gear oils for developing precision data, the test method can be extended to other viscosity grades and to non-extreme pressure gear oils. Refer to Classification D 2422 for viscosity grades.
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.

General Information

Status
Historical
Publication Date
14-Aug-1995
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.09 - Oxidation of Lubricants
Current Stage
Ref Project

Relations

Replaced By
ASTM D5763-95(2001) - Standard Test Method for Oxidation and Thermal Stability Characteristics of Gear Oils Using Universal Glassware
Effective Date
15-Aug-1995

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ASTM D5763-95 - Standard Test Method for Oxidation and Thermal Stability Characteristics of Gear Oils Using Universal GlasswareASTM D5763-95 - Standard Test Method for Oxidation and Thermal Stability Characteristics of Gear Oils Using Universal Glassware
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ASTM D5763-95 - Standard Test Method for Oxidation and Thermal Stability Characteristics of Gear Oils Using Universal Glassware
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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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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: D 5763 – 95 An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Oxidation and Thermal Stability Characteristics of Gear Oils
1
Using Universal Glassware
This standard is issued under the fixed designation D 5763; 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.
1. Scope of a container and is not easily removed.
3.1.2 aliquot, n—portion of sample being tested that is a
1.1 This test method covers the determination of the oxida-
representative portion of the whole.
tion characteristics of extreme pressure and non-extreme pres-
3.1.3 extreme pressure gear oil, n—gear oil that contains
sure gear oils and includes the quantitative determination of
chemical additives, such as sulfur and phosphorus compounds,
total sludge, viscosity change, and oil loss.
which produce a protective film on the metal surface to provide
NOTE 1—While the round-robin tests used ISO VG 220 extreme
anti-scuffing and anti-scoring properties.
pressure gear oils for developing precision data, the test method can be
3.1.4 filterable sludge, n—sludge that is formed in the oil.
extended to other viscosity grades and to non-extreme pressure gear oils.
3.1.5 non-extreme pressure gear oil, n, n—gear oil that
Refer to Classification D 2422 for viscosity grades.
contains no extreme pressure additives.
1.2 The values stated in SI units are to be regarded as the
3.1.6 oxidation, n—the process by which oxygen chemi-
standard. The values given in parentheses are for information
cally reacts with materials.
only.
3.1.7 sludge, n—in gear oils, a precipitate that sometimes
1.3 This standard does not purport to address all of the
forms as the oil ages or oxidizes.
safety concerns, if any, associated with its use. It is the
3.1.8 universal glassware, n—the glassware that is de-
responsibility of the user of this standard to establish appro-
scribed in the universal oxidation thermal stability test. Refer
priate safety and health practices and determine the applica-
to Guide D 4871.
bility of regulatory limitations prior to use.
4. Summary of Test Method
2. Referenced Documents
4.1 The viscosity of the gear oil being tested is determined.
2.1 ASTM Standards:
A100-g aliquot of the oil in a weighed apparatus is subjected to
D 445 Test Method for Kinematic Viscosity of Transparent
a temperature of 120°C for 312 h while dry air is passed
and Opaque Liquids (and the Calculation of Dynamic
through the aliquot at 3 L/h.
2
Viscosity)
4.2 At the end of the stress period, the aliquot is cooled to
D 2422 Classification of Industrial Fluid Lubricants by
room temperature. The apparatus is reweighed to determine oil
2
Viscosity System
loss. Filterable sludge is recovered by vacum filtration using a
D 2893 Test Method for Oxidation Characteristics of Ex-
2.8-μm glass fiber filter medium. The viscosity of the filtered
3
treme Pressure Lubricating Oils
oil is determined. Sludge adhering to the oxidation cell and
D 4057 Practice for Manual Sampling of Petroleum and
associated glassware is rinsed with heptane and the washings
3
Petroleum Products
passed through the same filter used to filter the filterable
D 4871 Guide for Universal Oxidation/Thermal Stability
sludge. The filter is dried in an oven to a constant weight to
4
Test Apparatus
determine the total filterable sludge.
5
E 1 Specification for ASTM Thermometers
4.3 The apparatus is dried and weighed to determine the
amount of adherent sludge. The sum of the filterable sludge and
3. Terminology
adherent sludge is reported as total sludge. The percentage
3.1 Definitions of Terms Specific to This Standard:
change in viscosity and percent oil loss are also reported.
3.1.1 adherent sludge, n—sludge that is formed on the walls
5. Significance and Use
1
This test method is under the jurisdiction of ASTM Committee D-2 on
5.1 Degradation of gear oils by oxidation or thermal break-
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
down, or both, can result in sludge buildup and render the oil
D02.09 on Oxidation.
unsuitable for further use as a lubricant.
Current edition approved Aug. 15, 1995. Published October 1995.
2
5.2 This is the only test method that employs glassware to
Annual Book of ASTM Standards, Vol 05.01.
3
Annual Book of ASTM Standards, Vol 05.02.
measure the amount of sludge produced during oxidation and
4
Annual Book of ASTM Standards, Vol 05.03.
thermal degradation. This test method is a modification of Test
5
Annual B
...

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