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Kinetics of the Catastrophic Oxidation of Metallic Copper Under the Influence of PbO

Authors
  • Klimashin, Anton1
  • 1 Russian Academy of Sciences, Baikov Institute of Metallurgy and Materials Science, Leninsky pr. 49, Moscow, 119991, Russian Federation , Moscow (Russia)
Type
Published Article
Journal
Oxidation of Metals
Publisher
Springer US
Publication Date
Jan 11, 2019
Volume
91
Issue
3-4
Pages
451–462
Identifiers
DOI: 10.1007/s11085-019-09892-3
Source
Springer Nature
Keywords
License
Yellow

Abstract

This paper shows that copper, when in direct contact with lead (II) oxide, is subject to catastrophic oxidation at 800 °C in air. Isothermal kinetics of this oxidation were found to obey the parabolic rate law, which is evidence of diffusion limiting of the process. The calculated parabolic rate constant of copper oxidation is 5.3 × 10−5 and 7.2 × 10−5 kg2 m−4 s−1 at a specific PbO mass of 0.35 and 0.8 kg m−2, respectively, which are two orders of magnitude higher than the value of pure copper under the same conditions. This is due to higher (as compared to solid oxides) diffusion coefficients in the oxide melt contained in the oxide layer. The microstructure and the phase composition of the formed oxide layer were also investigated.

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