Abstract
AT temperatures above the melting point of vanadium pentoxide (675° C), the rate of oxidation of vanadium is extremely rapid and the kinetics have been described1 in terms of the following equation 
where w is the weight of oxygen absorbed per square cm, t is the duration of oxidation, and a, k and m are constants with m, the rate index, close to 0.7. Although not entirely unknown2,3, such a value is both unusual and difficult to rationalize. It has been considered to be due to a combination of linear and parabolic processes, presupposing similar activation energies unless m is temperature dependent.
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References
Price, W. R., and Stringer, J., J. Less Common Metals, 8, 165 (1965).
Stringer, J., J. Less Common Metals, 6, 207 (1964).
Gebhardt, E., and Seghezzi, H. D., Z. Metallkunde, 50, 248 (1959).
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PRICE, W., STRINGER, J. Oxidation of Vanadium in the Liquid Oxide Region. Nature 212, 1356 (1966). https://doi.org/10.1038/2121356a0
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DOI: https://doi.org/10.1038/2121356a0
