STP1399: Use of Coatings to Assess the Crevice Corrosion Resistance of Stainless Steels in Warm Seawater

    Kain, RM
    Senior Corrosion Scientist, LaQue Center for Corrosion Technology, Inc., Wrightsville Beach, NC

    Pages: 16    Published: Jan 2000


    Abstract

    This paper focuses on the utility of epoxy-type coatings for testing the crevice corrosion resistance of a variety of stainless type alloys in warm, natural seawater. Details of surface preparation, coating application and exposure to 30°C seawater for periods of up to six months are provided. Testing comprised exposure of UNS S31603, UNS N08367 and UNS S20910 in one or more of the following forms: pipe, sheet, welded plate. Results are discussed in terms of alloy resistance to crevice corrosion initiation and propagation. The attributes of coatings as a crevice former are reviewed. While alloy N08367 was clearly the most resistant to crevice corrosion initiation at coating sites, it suffered intense attack in some cases.

    Keywords:

    warm seawater, crevice corrosion, coatings, austenitic stainless steel


    Paper ID: STP13570S

    Committee/Subcommittee: G01.09

    DOI: 10.1520/STP13570S


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