Abstract
Recent experimental results for the oxidation of pure iron to magnetite below the eutectoid temperature for the formation of wüstite (570 °C) are re-analysed with respect to the mechanisms which control the overall reaction kinetics. The experimental parabolic rate constants are compared with those expected for cation bulk diffusion controlled reaction kinetics. The comparison shows that the experimental rate constants are as much as two orders of magnitude larger than the calculated values suggesting that processes other than cation bulk diffusion contribute to the overall reaction kinetics in the set of experiments investigated.
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Tinkler, S., Dieckmann, R. Limited role of cation bulk diffusion in the oxidation of pure iron to magnetite. J Mater Sci 27, 3799–3802 (1992). https://doi.org/10.1007/BF00545459
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DOI: https://doi.org/10.1007/BF00545459