ASTM D4048-97

Standard Test Method for Detection of Copper Corrosion from Lubricating Grease

SCOPE
1.1 This test method covers the detection of the corrosiveness to copper of lubricating grease.  
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 hazard statements, see Note 1.

General Information

• Status: Historical
• Publication Date: 31-Dec-1996
• ICS: 75.100 - Lubricants, industrial oils and related products
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.G0.01 - Chemical and General Laboratory Tests

Relations

• Replaced By: ASTM D4048-02 - Standard Test Method for Detection of Copper Corrosion from Lubricating Grease
• Effective Date: 10-Apr-2002

Standards Content (Sample)

Designation: D 4048 – 97 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
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Detection of Copper Corrosion from Lubricating Grease
This standard is issued under the fixed designation D 4048; 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 may be of some value in predicting possible chemical attack on
lubricated parts, such as bearings that contain copper or copper
1.1 This test method covers the detection of the corrosive-
alloys. Such corrosion, for example, can cause premature
ness to copper of lubricating grease.
bearing failures. However, no correlations with actual field
1.2 The values stated in SI units are to be regarded as the
service, most of which are under dynamic conditions, have
standard. The values given in parentheses are for information
been established. It does not measure either the ability of the
only.
lubricant to inhibit copper corrosion caused by factors other
1.3 This standard does not purport to address all of the
than the lubricant itself nor does it measure the stability of the
safety concerns, if any, associated with its use. It is the
grease in the presence of copper.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6. Apparatus
bility of regulatory limitations prior to use. For specific hazard
6.1 Test Jars—Cloud and pour jars, cylindrical jars of clear
statements, see Note 1.
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glass with flat bottoms, 30 mm to 33.5-mm (1 ⁄16 in. to 1 ⁄16 in.)
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2. Referenced Documents
inside diameter, and 115 mm to 125 mm (4 ⁄2 in. to 5 in.) in
height as described in Test Methods D 97 and D 2500.
2.1 ASTM Standards:
2
6.2 Test Jar Covers—Beakers, 50-mL; borosilicate glass, 40
D 97 Test Method for Pour Point of Petroleum Oils
mm (1.6 in.) by 50 mm (2.0 in.) suitable for covering
D 130 Test Method for Detection of Copper Corrosion from
2
individual test jars. Small porcelain or glazed silica crucibles or
Petroleum Products by the Copper Strip Tarnish Test
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crucible covers or watch glasses or vented corks that lightly
D 2500 Test Method for Cloud Point of Petroleum Oils
cover the test jars, allowing pressure equalization between the
2.2 Adjuncts: ASTM
3
inside and outside of the jars, yet minimizing exposure of the
Copper Strip Corrosion Standard
inside of the jars to foreign vapors present in the oven will also
3. Terminology
be satisfactory.
6.3 Oven—A circulating air oven or liquid bath capable of
3.1 There are no terms in this method that require new or
other than dictionary definitions. maintaining a temperature of 100 6 1°C (212 6 2°F) or other
desired temperatures with the same precision.
4. Summary of Test Method
6.4 Polishing Vise—For holding the copper strip firmly
4.1 A prepared copper strip is totally immersed in a sample
without marring the edges while polishing. Any convenient
of grease and heated in an oven or liquid bath at a specified
type of holder (see the Appendix of Test Method D 130) may
temperature for a definite period of time. Commonly used
be used, provided that the strip is held tightly and that the
conditions are 100°C (212°F) for 24 h. At the end of this
surface of the strip being polished is supported above the
heating period, the strip is removed, washed, and compared
surface of the holder.
with the ASTM Copper Strip Corrosion Standards.
6.5 Viewing Test Tubes—Flat glass test tubes may be used to
protect corroded strips for close inspection or storage. (See the
5. Significance and Use
Appendix of Test Method D 130.)
2,4
5.1 This test method measures the tendency of lubricating
6.6 ASTM Copper Strip Corrosion Standards consist of
grease to corrode copper under specific static conditions. It
reproductions in color of typical strips representing degrees of
tarnish and corrosion, the reproductions being encased in
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plastic in the form of a plaque.
This test method is under the jurisdiction of ASTM Committee D-2 on
Petroleum products and lubricants and is the direct responsibility of Subcommittee 6.6.1 Keep the plastic-encased printed ASTM Copper Strip
D02.G on Lubricating Grease.
Corrosion Standards protected from light to avoid the possi-
Current edition approved June 10, 1997. Published October 1997. Originally
bility of fading. Inspect for fading by comparing two different
published as D 4048 – 81. Last previous edition D 4048 – 91.
2
Annual Book of ASTM Standards, Vol 05.01.
3
Available from ASTM Headquarters for a nominal charge. Request Adjunct
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PCN 12-401300-00. Available from commercial sourc
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