STP965: Barrier Coatings for the Protection of Steel and Aluminum Alloys in the Marine Atmosphere

    Shaw, BA
    Materials engineer, David Taylor Naval Ship Research and Development Center, Bethesda, MD

    Aylor, DM
    Materials engineer, David Taylor Naval Ship Research and Development Center, Bethesda, MD

    Pages: 14    Published: Jan 1987


    Abstract

    The marine atmospheric corrosion resistance of a variety of metallic, ceramic, and metallic/ceramic coatings on aluminum and steel alloys is investigated to assess the long term protection capabilities of these barrier coatings. Results of 6 to 42 month exposures indicate that the following coatings provide the best marine atmospheric corrosion protection: thermal sprayed aluminum, zinc, zinc-aluminum pseudo alloy, aluminum oxide (Al2O3), and both zinc-based and aluminum-based metallic/ceramic coatings. The application of a low viscosity sealer to one of the ceramic coatings extends the protective capability of the coating.

    Keywords:

    coatings, metallic coatings, metallic/ceramic coatings, ceramic coatings, thermal spray, flame spray, arc spray, plasma spray, electron probe microanalysis, metallography, corrosion, aluminum, zinc, zinc-aluminum alloys, marine exposures, marine atmosphere, steel


    Paper ID: STP25850S

    Committee/Subcommittee: G01.04

    DOI: 10.1520/STP25850S


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