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    ASTM D4048 - 19a

    Standard Test Method for Detection of Copper Corrosion from Lubricating Grease

    Active Standard ASTM D4048 | Developed by Subcommittee: D02.G0.01

    Book of Standards Volume: 05.01

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    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.

    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 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.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    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

    ICS Code

    ICS Number Code 75.100 (Lubricants, industrial oils and related products)

    UNSPSC Code

    UNSPSC Code 15121902(Grease)

    Referencing This Standard
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    DOI: 10.1520/D4048-19A

    Citation Format

    ASTM D4048-19a, Standard Test Method for Detection of Copper Corrosion from Lubricating Grease, ASTM International, West Conshohocken, PA, 2019, www.astm.org

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