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    Deep-Sea Corrosion Rusticles from Iron-Hulled Shipwrecks

    Access Status
    Fulltext not available
    Authors
    Silva‐Bedoya, Lina
    Watkin, Elizabeth
    Machuca Suarez, Laura
    Date
    2021
    Type
    Journal Article
    
    Metadata
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    Citation
    Silva‐Bedoya, L. and Watkin, E. and Machuca, L. 2021. Deep-Sea Corrosion Rusticles from Iron-Hulled Shipwrecks. Materials and Corrosion.
    Source Title
    Materials and Corrosion
    DOI
    10.1002/maco.202112289
    ISSN
    0947-5117
    Faculty
    Faculty of Health Sciences
    Faculty of Science and Engineering
    School
    Curtin Medical School
    WASM: Minerals, Energy and Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/83105
    Collection
    • Curtin Research Publications
    Abstract

    Vertical tube‐shaped iron‐oxide accumulations, named rusticles, obtained from the wrecks of the HMAS Sydney II and the HSK Kormoran at 2480 m ocean depth were chemically analysed along with surrounding seawater. Rusticles consisted of a porous aggregation of iron oxides and high levels of toxic metals and metalloids. Their growth rate is approximately 1 cm per year, predominantly over the areas of the hulls that remained underwater during their service years. A connection between the quality of antifouling paints and rusticle growth and composition was found. A mechanism explaining the formation of rusticles is proposed based on corrosion of carbon steel in deep‐seawater, water chemistry, surface complexation of iron oxides and chemical garden formation mechanisms. This study provides a complete rationalisation of the process of rusticle formation and deep‐water corrosion that is applicable to the long‐term integrity of offshore infrastructure.

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