STP965

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

    Published: Jan 1987


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    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


    Author Information:

    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


    Paper ID: STP25850S

    Committee/Subcommittee: G01.04

    DOI: 10.1520/STP25850S


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