The Oxidation of Specpure Nickel

[摘要] The measurement of Oxidation of nickel has been investigated using vacuum quartz microbalance in the temperature range of 500¡Æ¡­ 800 ¡É at various oxygen pressure. The rate constants of nickel-oxidation were evaluated according to the parabolic rate law. From the Arrhenius equation, the activation energy in the range of experimental temperatures were found that Eact= 35.4 Kcal/mole. It was also found that the parabolic rate constants varied approximately as the one fifth power of the oxygen pressure for nickel-oxidation. The mechanism for the oxidation of this metal were seemed to be via cation vacancy produced by excess of oxygen dissolved in the oxide film.

[学科分类] 化学（综合）