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ASTM D4048-22

Current Revision

Standard Test Method for Detection of Copper Corrosion from Lubricating Grease

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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 standard. The values given in parentheses after SI units are provided for information only and are not considered standard.

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific warning statements, see Sections 7, 8, and 10.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


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.

SDO ASTM: ASTM International
Document Number D4048
Publication Date Aug. 15, 2022
Language en - English
Page Count 5
Revision Level 22
Supercedes
Committee D02.G0.01
Publish Date Document Id Type View
Aug. 15, 2022 D4048-22 Revision
July 1, 2019 D4048-19A Revision
June 1, 2019 D4048-19 Revision
Dec. 1, 2016 D4048-16E01 Revision
Dec. 1, 2016 D4048-16 Revision
May 1, 2010 D4048-10 Revision
April 10, 2002 D4048-02 Revision
Jan. 1, 1997 D4048-97 Revision
May 1, 2008 D4048-02R08 Reaffirmation