ASTM B555 - 86(2013)

    Standard Guide for Measurement of Electrodeposited Metallic Coating Thicknesses by Dropping Test

    Active Standard ASTM B555 | Developed by Subcommittee: B08.10

    Book of Standards Volume: 02.05


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    ASTM B555

    Significance and Use

    4.1 The thickness of a metal coating is often critical to its performance.

    4.2 This procedure is useful for an approximate determination when the best possible accuracy is not required. For more reliable determinations, the following methods are available: Test Methods B487, B499, B504, and B568.

    4.3 This test assumes that the rate of dissolution of the coating by the corrosive reagent under the specified conditions is always the same.

    1. Scope

    1.1 This guide covers the use of the dropping test to measure the thickness of electrodeposited zinc, cadmium, copper, and tin coatings.

    Note 1Under most circumstances this method of measuring coating thicknesses is not as reliable or as convenient to use as an appropriate coating thickness gauge (see Test Methods B499, B504, and B568).

    1.2 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.


    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

    B487 Test Method for Measurement of Metal and Oxide Coating Thickness by Microscopical Examination of Cross Section

    B499 Test Method for Measurement of Coating Thicknesses by the Magnetic Method: Nonmagnetic Coatings on Magnetic Basis Metals

    B504 Test Method for Measurement of Thickness of Metallic Coatings by the Coulometric Method

    B568 Test Method for Measurement of Coating Thickness by X-Ray Spectrometry

    D1193 Specification for Reagent Water


    ICS Code

    ICS Number Code 25.220.40 (Metallic coatings)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/B0555

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