ASTM D4048-02

Standard Test Method for Detection of Copper Corrosion from Lubricating Grease

SIGNIFICANCE AND USE
This test method measures the tendency of lubricating grease to corrode copper under specific static conditions. It may be of some value in predicting possible chemical attack on lubricated parts, such as bearings that contain copper or copper alloys. Such corrosion, for example, can cause premature bearing failures. However, no correlations with actual field service, most of which are under dynamic conditions, have been established. It does not measure either the ability of the lubricant to inhibit copper corrosion caused by factors other than the lubricant itself nor does it measure the stability of the grease in the presence of copper.
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 Sections 7, 8, and 10.

General Information

• Status: Historical
• Publication Date: 09-Apr-2002
• 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

• Replaces: ASTM D4048-97 - Standard Test Method for Detection of Copper Corrosion from Lubricating Grease
• Effective Date: 10-Apr-2002
• Replaced By: ASTM D4048-02(2008) - Standard Test Method for Detection of Copper Corrosion from Lubricating Grease
• Effective Date: 01-May-2008
• Referred By: ASTM F2489-06(2022) - Standard Guide for Instrument and Precision Bearing Lubricants—Part 2 Greases
• Effective Date: 10-Apr-2002
• Referred By: ASTM D8324-21 - Standard Guide for Selection of Environmentally Acceptable Lubricants for the U.S. Environmental Protection Agency (EPA) Vessel General Permit
• Effective Date: 10-Apr-2002

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
An American National Standard
Designation: D 4048 – 02
Standard Test Method for
1
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 end of this heating period, the strip is removed, washed, and
compared with the Copper Strip Corrosion Standard.
1.1 This test method covers the detection of the corrosive-
ness to copper of lubricating grease.
5. Significance and Use
1.2 The values stated in SI units are to be regarded as the
5.1 This test method measures the tendency of lubricating
standard. The values given in parentheses are for information
grease to corrode copper under specific static conditions. It
only.
maybeofsomevalueinpredictingpossiblechemicalattackon
1.3 This standard does not purport to address all of the
lubricated parts, such as bearings that contain copper or copper
safety concerns, if any, associated with its use. It is the
alloys. Such corrosion, for example, can cause premature
responsibility of the user of this standard to establish appro-
bearing failures. However, no correlations with actual field
priate safety and heal practices and determine the applicability
service, most of which are under dynamic conditions, have
of regulatory limitations prior to use.For specific hazard
been established. It does not measure either the ability of the
statements, see Sections 7, 8, and 10.
lubricant to inhibit copper corrosion caused by factors other
2. Referenced Documents than the lubricant itself nor does it measure the stability of the
grease in the presence of copper.
2.1 ASTM Standards:
2
D97 Test Method for Pour Point of Petroleum Oils
6. Apparatus
D 130 Test Method for Detection of Copper Corrosion from
2 6.1 Test Jars—Cloud and pour jars, cylindrical jars of clear
Petroleum Products by the Copper Strip Tarnish Test
3 5
glasswithflatbottoms,30mmto33.5-mm(1 ⁄16in.to1 ⁄16in.)
D 2500 Test Method for Cloud Point of Petroleum Prod-
1
2 inside diameter, and 115 mm to 125 mm (4 ⁄2 in. to 5 in.) in
ucts
height as described in Test Methods D 97 and D 2500.
2.2 ASTM Adjuncts:
3 6.2 Test Jar Covers—Beakers, 50-mL; borosilicate glass,
Copper Strip Corrosion Standard
approximately 40 mm (1.6 in.) by 50 mm (2.0 in.) suitable for
3. Terminology covering individual test jars. Small porcelain or glazed silica
crucibles or crucible covers or watch glasses or vented corks
3.1 There are no terms in this test method that require new
that lightly cover the test jars, allowing pressure equalization
or other than dictionary definitions.
between the inside and outside of the jars, yet minimizing
4. Summary of Test Method
exposure of the inside of the jars to foreign vapors present in
the oven will also be satisfactory.
4.1 Aprepared copper strip is totally immersed in a sample
6.3 Oven—A circulating air oven or liquid bath capable of
of grease and heated in an oven or liquid bath at a specified
maintaining a temperature of 100 6 1°C (212 6 2°F) or other
temperature for a definite period of time. Commonly used
desired temperatures with the same precision.
conditionsare100 61°C(212 62°F)for24h 65min.Atthe
6.4 Polishing Vise—For holding the copper strip firmly
without marring the edges while polishing. Any convenient
type of holder (see Appendix X1 of Test Method D 130) may
1
This test method is under the jurisdiction of ASTM Committee D02 on
be used, provided that the strip is held tightly and that the
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
surface of the strip being polished is supported above the
D02.G on Lubricating Grease.
Current edition approved April 10, 2002. Published July 2002. Originally
surface of the holder.
published as D 4048–81. Last previous edition D 4048–97.
6.5 Viewing Test Tubes—Flatglasstesttubesmaybeusedto
2
Annual Book of ASTM Standards, Vol 05.01.
3 protect corroded strips for close inspection or storage. (See the
Available from ASTM International Headquarters. Order Adjunct No.
ADJD0130. Appendix X1 of Test Method D 130.)
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D4048–02
6.6 Copper Strip Corrosion Standard—consists of repro- wash solvent (Warning—see 7.1.) from which it can be
ductions in color of typical strips representing degrees of withdrawnimmediatelyforfinalpolishingorinwhichitcanbe
tarnish and corrosion, the repr
...