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The kinetics of oxidation of iron-silicon and iron-aluminum alloy melts by pure oxygen or oxygen-bearing gases

  • Pyrometallurgy
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Abstract

The kinetics of oxidation of Fe−Si and Fe−Al melts by pure oxygen, and that of pure Fe by He−O2, N2−O2, or Ar−O2 mixtures have been investigated by a modified Sieverts' method at 1600°C. Considerable decrease in the oxidation rate has been observed for the alloy melts containing a few percent of Si or Al since formation of a silica- or alumina-rich oxide layer on the melts prevents further progress of the exothermic chemical reaction. The oxidation rate for melts high in Al has been considered to be limited by the diffusion of ions through the oxide layer. Addition of diluents to O2 markedly and continuously decreases the oxidation rate of a pure Fe melt. The latter rate has been show to be controlled by the diffusion of O2 across the gaseous boundaries at gas/melt interfaces.

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Authors and Affiliations

  1. Research Laboratories, Kawasaki Steel Corporation, Chiba, Japan

    T. Emi (Senior Research Associate)

  2. Department of Materials and Metellurgical Engineering, The University of Michigan, 48104, Ann Arbor, Michigan

    R. D. Pehlke (Professor and Chairman)

Authors
  1. T. Emi
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  2. R. D. Pehlke
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Emi, T., Pehlke, R.D. The kinetics of oxidation of iron-silicon and iron-aluminum alloy melts by pure oxygen or oxygen-bearing gases. Metall Trans B 6, 95–101 (1975). https://doi.org/10.1007/BF02825683

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  • DOI: https://doi.org/10.1007/BF02825683

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