STP947

    The Influence of Chromating of Electrodeposited Copper-Nickel-Chromium Coatings on Steel: Results of Five Years of Field Corrosion Testing

    Published: Jan 1987


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    Abstract

    The results of five years of field corrosion testing of three-layer copper-nickel-chromium coatings with an external layer of microporous chromium, unchromated and electrochemically chromated, have been described and discussed. The corrosion testing was carried out in four natural atmospheres: industrial, urban, marine, and rural. A marked positive influence of chromating on corrosion resistance and durability of tested coatings has been found. Thicker Cu20 Ni20b Cr mp, both chromated and unchromated, coatings with external layer of microporous chromium can be used in all natural atmospheres in which the testing was carried out for at least six years without any corrosion changes.

    Keywords:

    corrosion, atmospheric corrosion, testing, corrosion testing, corrosion resistance, durability, electrodeposited coatings, three-layer copper-nickel-chromium coatings, microporous chromium coatings, electrochemical treatment, electrochemical chromating


    Author Information:

    Biestek, T
    Professor of chemistry, Institute of Precision Mechanics, Warsaw,


    Paper ID: STP20042S

    Committee/Subcommittee: B08.01

    DOI: 10.1520/STP20042S


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