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The effect of chlorine on the kinetics of oxidation of cobalt in environments containing 0.5 atmosphere of oxygen between 900 K and 1200 K

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Abstract

The corrosion of cobalt metal in gas mixtures containing argon, chlorine, and 0.5 atmosphere of oxygen has been studied by measuring the kinetics of the reaction using thermogravimetric techniques and by examination of the corrosion products using scanning electron microscopy. The corrosion products include both oxides and chlorides. The formation of volatile cobalt chloride plays a critical role in the corrosion process by attacking and penetrating the condensed oxide scale. At 1200 K, the Tedmon equation describes the kinetics of the corrosion process. At lower temperatures the corrosion behavior is more complex, and under some conditions the formation of a porous, nonprotective oxide scale can lead to rapid consumption of the metal.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Massachusetts Institute of Technology, 02139, Cambridge, MA

    M. J. Maloney (Graduate Research Assistant)

  2. Metallurgy, CEMM Department, University of Illinois at Chicago, P.O. Box 4348, 60680, Chicago, IL

    M. J. McNallan (Associate Professor)

Authors
  1. M. J. Maloney
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  2. M. J. McNallan
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Formerly Graduate Research Assistant

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Maloney, M.J., McNallan, M.J. The effect of chlorine on the kinetics of oxidation of cobalt in environments containing 0.5 atmosphere of oxygen between 900 K and 1200 K. Metall Trans B 16, 751–761 (1985). https://doi.org/10.1007/BF02667511

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  • DOI: https://doi.org/10.1007/BF02667511

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