ASTM D4048-16
(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
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.
Note 1: Because this test method requires the ability to determine subtle differences in color of copper strips, persons with certain types of color blindness may find it difficult to accurately compare a test strip to the Copper Strip Corrosion Standard.
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.
1.2.1 Exception—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 − 16
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 U.S. Department of Defense.
1. Scope* 3.2.1 Discussion—Acidic and other aggressive species, of-
ten sulfur-based, in a lubricant can attack copper or copper
1.1 This test method covers the detection of the corrosive-
alloys present in bearings or other lubricated surfaces. The
ness to copper of lubricating grease.
presence of this antagonistic interaction is often apparent in a
1.2 The values stated in SI units are to be regarded as the
well-defined series of color changes.
standard.
3.3 lubricant, n—any material interposed between two sur-
1.2.1 Exception—The values given in parentheses are for
faces that reduces the friction or wear between them.
information only.
3.4 lubricating grease, n—a semi-fluid to solid product of a
1.3 This standard does not purport to address all of the
dispersion of a thickener in a liquid lubricant.
safety concerns, if any, associated with its use. It is the
3.4.1 Discussion—The dispersion of the thickener forms a
responsibility of the user of this standard to establish appro-
two-phase system and immobilizes the liquid lubricant by
priate safety and heal practices and determine the applicability
surface tension and other physical forces. Other ingredients are
of regulatory limitations prior to use.For specific warning
commonly included to impart special properties.
statements, see Sections 7, 8, and 10.
4. Summary of Test Method
2. Referenced Documents
4.1 Aprepared copper strip is totally immersed in a sample
2
2.1 ASTM Standards:
of grease and heated in an oven or liquid bath at a specified
D97 Test Method for Pour Point of Petroleum Products
temperature for a definite period of time. Commonly used
D130 Test Method for Corrosiveness to Copper from Petro-
conditions are 100 °C 6 1 °C (212 °F 6 2 °F) for 24 h 6
leum Products by Copper Strip Test
5 min. At the end of this heating period, the strip is removed,
D2500 Test Method for Cloud Point of Petroleum Products
washed, and compared with the Copper Strip Corrosion Stan-
and Liquid Fuels
dard.
D4175 Terminology Relating to Petroleum Products, Liquid
Fuels, and Lubricants
5. Significance and Use
2.2 ASTM Adjuncts:
5.1 This test method measures the tendency of lubricating
3
Copper Strip Corrosion Standard
grease to corrode copper under specific static conditions. It
maybeofsomevalueinpredictingpossiblechemicalattackon
3. Terminology
lubricated parts, such as bearings that contain copper or copper
3.1 Definitions—See Terminology D4175.
alloys. Such corrosion, for example, can cause premature
3.2 copper corrosion, n—effect of a chemical attack on
bearing failures. However, no correlations with actual field
coppermetalbyalubricantcausingvariouslevelsoftarnishing
service, most of which are under dynamic conditions, have
and change in appearance.
been established. It does not measure either the ability of the
lubricant to inhibit copper corrosion caused by factors other
1
than the lubricant itself nor does it measure the stability of the
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
grease in the presence of copper.
Subcommittee D02.G0.01 on Chemical and General Laboratory Tests.
Current edition approved Dec. 1, 2016. Published January 2017. Originally NOTE 1—Because this test method requires the ability to determine
published in 1981. Last previous edition approved in 2010 as D4048 – 10. DOI:
subtle differences in color of copper strips, persons with certain types of
10.1520/D4048-16.
colorblindnessmayfinditdifficulttoaccuratelycompareateststriptothe
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Copper Strip Corrosion Standard.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on 6. Apparatus
the ASTM website.
3 6.1 Test Jars—Cloud and pour jars, cylindrical jars of clear
Available from ASTM International Headquarters. Order Adjunct No.
3 5
ADJD0130. Originally produced in 1973. glasswithflatbottoms,30 mmto33.5 mm(1 ⁄16 in.to1 ⁄16 in.)
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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...
This document is not an ASTM standard and is intended only to provide the user of an ASTM 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.
Designation: D4048 − 10 D4048 − 16
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 U.S. Department of Defense.
1. Scope 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.
1.2.1 Exception—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.
2. Referenced Documents
2
2.1 ASTM Standards:
D97 Test Method for Pour Point of Petroleum Products
D130 Test Method for Corrosiveness to Copper from Petroleum Products by Copper Strip Test
D2500 Test Method for Cloud Point of Petroleum Products and Liquid Fuels
D4175 Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
2.2 ASTM Adjuncts:
3
Copper Strip Corrosion Standard
3. Terminology
3.1 Definitions—See Terminology D4175.
3.2 copper corrosion, n—effect of a chemical attack on copper metal by a lubricant causing various levels of tarnishing and
change in appearance.
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.G0.01 on Chemical and General Laboratory Tests.
Current edition approved May 1, 2010Dec. 1, 2016. Published July 2010 January 2017. Originally published in 1981. Last previous edition approved in 20082010 as
D4048–02(2008).D4048 – 10. DOI: 10.1520/D4048-10.10.1520/D4048-16.
2
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from ASTM International Headquarters. Order Adjunct No. ADJD0130. Originally produced in 1973.
3.2.1 Discussion—
Acidic and other aggressive species, often sulfur-based, in a lubricant can attack copper or copper alloys present in bearings or
other lubricated surfaces. The presence of this antagonistic interaction is often apparent in a well-defined series of color changes.
3.3 lubricant, n—any material interposed between two surfaces that reduces the friction or wear between them.
3.4 lubricating grease, n—a semi-fluid to solid product of a dispersion of a thickener in a liquid lubricant.
3.4.1 Discussion—
The dispersion of the thickener forms a two-phase system and immobilizes the liquid lubricant by surface tension and other
physical forces. Other ingredients are commonly included to impart special properties.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D4048 − 16
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 100100 °C 6 1°C (2121 °C (212 °F 6 2°F)2 °F) for 24
h 6 5 min. 24 h 6 5 min. At the end of this heating period, the strip is removed, washed, and compared with the Copper Strip
Corrosion Standard.
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
cor
...
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