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  • Coating Thickness Testing

    Coating thickness is an important process parameter, which plays an important role in product quality, process control and cost control. It directly affects the corrosion resistance, electrical conductivity and even the reliability of the plated parts. Therefore, the measurement and control of coating thickness is an important control index of metal quality. As a professional reliability third-party testing organization, T,C&A Lab can perform coating thickness testing according to ISO, ASTM and other standards. Welcome to contact our experts for consultation.

    T,C&A Lab's testing methods include but are not limited to:

    • Metallographic method

    The cross section was detected by metallographic microscope to measure the local thickness of metal coating and oxide film. In general, thickness detection needs to be more than 1μm in order to ensure that the measurement results are within the error range. The greater the thickness, the smaller the error.

    • Coulomb method

    Coulomb method is suitable for measuring the thickness of single-layer and multi-layer metal coatings by anodic dissolution coulometric method. It can not only measure the thickness of the covering layer of flat samples, but also measure the thickness of the covering layer of cylindrical and wire rods. It is especially suitable for measuring the metal of multilayer nickel plating and its potential difference. The types of coatings measured are Au, Ag, Zn, Cu, Ni, Cr.

    • X-ray method

    X-ray method is suitable for measuring the thickness of the metal coating that needs to be analyzed in the electroplating and electronic circuit board industries. Including: gold (Au), silver (Ag), tin (Sn), copper (Cu), nickel (Ni), chromium (Cr) and other metal element thickness. This measurement method can simultaneously measure the three-layer coating system, or simultaneously measure the thickness and composition of the three-layer component.

    • Magnetic induction method

    Magnetic induction method is suitable for measuring non-magnetic coatings over ferrous substrates and magnetic coatings over non-magnetic substrates.

    • Eddy-current method

    Eddy-current method is suitable for measuring non-conductive coatings on non-ferrous conductive substrates, non-ferrous conductive coatings on non-conductive substrates and some non-ferrous metal coatings on non-ferrous metals.

    • Beta backscatter

    Beta backscatter is an advanced non-destructive physical thickness measurement method, which is widely used to measure metal and non-metallic coatings thickness such as gold, silver, lead-tin alloy and so on.

    Standards we test to

    ISO 4518Metallic Coatings — Measurement of Coating Thickness — Profilometric Method
    ASTM B487Standard Test Method for Measurement of Metal and Oxide Coating Thickness by Microscopical Examination of Cross Section
    ASTM B748Standard Test Method for Measurement of Thickness of Metallic Coatings by Measurement of Cross Section with a Scanning Electron Microscope

    In addition, the experts in our Coating Thickness Testing Laboratory also provide a variety of custom testing services as your needs and requirements. Let's discuss the custom service with our experts for free.

    Instruments and data

    Coating Thickness Testing 1
    Coating Thickness Testing 2
    Coating Thickness Testing 3
    Coating Thickness Testing 4


    1. Biligiri S. Coating Thickness measurement challenges using XRF Technology[J]. Metal Finishing, 2007.
    2. Hernández-Escampa, M.; et al. Electrochemical Evaluation of a Recycled Copolymer Coating for Cultural Heritage Conservation Purposes[J]. International Journal of Ploymer Science,2013,(2013-8-7), 2013, 2013:127-132.

    Note: this service is for Research Use Only and Not intended for clinical use.


    T,C & A LAB is an independent lab providing quality or custom testing, characterization and analysis of a variety of materials. Our engaged experts are ready to help you.

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