ASTM D4048-02(2008)
(Test Method)Standard Test Method for Detection of Copper Corrosion from Lubricating Grease
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 heal practices and determine the applicability of regulatory limitations prior to use.For specific warning statements, see Sections 7, 8, and 10.
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Designation: D4048 – 02 (Reapproved 2008)
Standard Test Method for
1
Detection of Copper Corrosion from Lubricating Grease
This standard is issued under the fixed designation D4048; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 4. Summary of Test Method
1.1 This test method covers the detection of the corrosive- 4.1 Aprepared copper strip is totally immersed in a sample
ness to copper of lubricating grease. of grease and heated in an oven or liquid bath at a specified
1.2 The values stated in SI units are to be regarded as the temperature for a definite period of time. Commonly used
standard. The values given in parentheses are for information conditionsare100 61°C(212 62°F)for24h 65min.Atthe
only. end of this heating period, the strip is removed, washed, and
1.3 This standard does not purport to address all of the compared with the Copper Strip Corrosion Standard.
safety concerns, if any, associated with its use. It is the
5. Significance and Use
responsibility of the user of this standard to establish appro-
priate safety and heal practices and determine the applicability 5.1 This test method measures the tendency of lubricating
grease to corrode copper under specific static conditions. It
of regulatory limitations prior to use.For specific warning
statements, see Sections 7, 8, and 10. maybeofsomevalueinpredictingpossiblechemicalattackon
lubricated parts, such as bearings that contain copper or copper
2. Referenced Documents
alloys. Such corrosion, for example, can cause premature
2
2.1 ASTM Standards: bearing failures. However, no correlations with actual field
D97 Test Method for Pour Point of Petroleum Products service, most of which are under dynamic conditions, have
D130 Test Method for Corrosiveness to Copper from Pe- been established. It does not measure either the ability of the
troleum Products by Copper Strip Test lubricant to inhibit copper corrosion caused by factors other
D2500 Test Method for Cloud Point of Petroleum Products than the lubricant itself nor does it measure the stability of the
2.2 ASTM Adjuncts: grease in the presence of copper.
3
Copper Strip Corrosion Standard
6. Apparatus
3. Terminology
6.1 Test Jars—Cloud and pour jars, cylindrical jars of clear
3 5
3.1 There are no terms in this test method that require new glasswithflatbottoms,30mmto33.5-mm(1 ⁄16in.to1 ⁄16in.)
1
or other than dictionary definitions. inside diameter, and 115 mm to 125 mm (4 ⁄2 in. to 5 in.) in
height as described in Test Methods D97 and D2500.
6.2 Test Jar Covers—Beakers, 50-mL; borosilicate glass,
approximately 40 mm (1.6 in.) by 50 mm (2.0 in.) suitable for
1
This test method is under the jurisdiction of ASTM Committee D02 on
covering individual test jars. Small porcelain or glazed silica
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.G0.01 on Chemical and General Laboratory Tests.
crucibles or crucible covers or watch glasses or vented corks
Current edition approved May 1, 2008. Published September 2008. Originally
that lightly cover the test jars, allowing pressure equalization
published in 1981. Last previous edition approved in 2002 as D4048–02. DOI:
between the inside and outside of the jars, yet minimizing
10.1520/D4048-02R08.
2
exposure of the inside of the jars to foreign vapors present in
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
the oven will also be satisfactory.
Standards volume information, refer to the standard’s Document Summary page on
6.3 Oven—A circulating air oven or liquid bath capable of
the ASTM website.
3
maintaining a temperature of 100 6 1°C (212 6 2°F) or other
Available from ASTM International Headquarters. Order Adjunct No.
ADJD0130. Originally produced in 1973. desired temperatures with the same precision.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D4048 – 02 (2008)
6.4 Polishing Vise—For holding the copper strip firmly Grade n-heptane (Warning—see 7.1) are suitable solvents.
without marring the edges while polishing. Any convenient Because of possible toxic effects, the use of benzene should be
type of holder (see Appendix X1 on Optional Useful Equip- avoided.
ment in Test Method D130) may be used, provided that the
8. Preparation of Strip
strip is held tightly and that the surface of the strip being
8.1 Mec
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
An American National Standard
Designation:D4048–97 Designation: D 4048 – 02 (Reapproved 2008)
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 (´) 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
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 healthheal practices and determine the applicability of regulatory
limitations prior to use.For specific hazardwarning statements, see Sections Note 17, 8, and 10.
2. Referenced Documents
2
2.1 ASTM Standards:
D 97 Test Method for Pour Point of Petroleum Oils Products
2
D 130Test Method for Detection of Copper Corrosion from Petroleum Products by the Copper StripTarnishTest Test Method
for Corrosiveness to Copper from Petroleum Products by Copper Strip Test
2
D 2500 Test Method for Cloud Point of Petroleum Oils Products
2.2 ASTM Adjuncts: ASTM ASTM Adjuncts:
3
Copper Strip Corrosion Standard
3. Terminology
3.1 There are no terms in this test method that require new or other than dictionary definitions.
4. Summary of Test Method
4.1 A prepared copper strip is totally immersed in a sample of grease and heated in an oven or liquid bath at a specified
temperature for a definite period of time. Commonly used conditions are 100 6 1°C (212 6 2°F) for 24 h 6 5 min. At the end
of this heating period, the strip is removed, washed, and compared with the ASTM Copper Strip Corrosion Standards.
5. Significance and Use
5.1 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.
6. Apparatus
3 5
6.1 Test Jars—Cloud and pour jars, cylindrical jars of clear glass with flat bottoms, 30 mm to 33.5-mm (1 ⁄16 in. to 1 ⁄16 in.)
1
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.
6.2 Test Jar Covers—Beakers , 50-mL; borosilicate glass, approximately 40 mm (1.6 in.) by 50 mm (2.0 in.) suitable for
covering individual test jars. Small porcelain or glazed silica crucibles or crucible covers or watch glasses or vented corks that
1
This test method is under the jurisdiction of ASTM Committee D-2 on Petroleum products and lubricants and is the direct responsibility of Subcommittee D02.G on
Lubricating Grease.
Current edition approved June 10, 1997. Published October 1997. Originally published as D4048–81. Last previous edition D4048–91.
1
This test method is under the jurisdiction ofASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D02.G0.01
on Chemical and General Laboratory Tests.
Current edition approved May 1, 2008. Published September 2008. Originally published in 1981. Last previous edition approved in 2002 as D 4048–02.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 05.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from ASTM Headquarters for a nominal charge. Request Adjunct PCN 12-401300-00.
3
Available from ASTM International Headquarters. Order Adjunct No. ADJD0130. Originally produced in 1973.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
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