Oxidation of Metals

, Volume 32, Issue 1–2, pp 111–123 | Cite as

Influence of the solubility product on the concentration profiles of internal oxidation

  • H. -J. Christ
  • H. Biermann
  • F. C. Rizzo
  • H. G. Sockel
Article
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Revised:

Abstract

A computer-based method is used to simulate the process of penetration of a foreign element (e.g., oxygen) into an alloy connected with internal precipitation of a compound of this element with a solute in the alloy. The method employed is based on the solution of the differential equations corresponding to this high-temperature corrosion phenomenon with the help of the finite-difference technique. To demonstrate the possibilities of the calculation method, various cases were treated which differ especially regarding the thermodynamic stability of the internal precipitates. The calculated concentration profiles and penetration depths obtained are reported and discussed. In the case of internal precipitates of high stability, the results are compared with the approaches derived in the literature for internal oxidation and are used to determine the parameter ranges in which the analytical equations apply. The results obtained for the case of a less-stable compound is used to illustrate the influence of the solubility product on the concentration profiles.

Key words

internal oxidation carburization computer simulation finite-difference technique 
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Copyright information

© Plenum Publishing Corporation 1989

Authors and Affiliations

  • H. -J. Christ
    • 1
  • H. Biermann
    • 1
  • F. C. Rizzo
    • 2
  • H. G. Sockel
    • 1
  1. 1.Institut für Werkstoffwissenschaften, Lehrstuhl 1Universität Erlangen-NürnbergErlangenFederal Republic of Germany
  2. 2.Departmento de Ciência dos Materiais e MetalurgiaPontificia Universidade Católica do Rio de JaneiroRio de JaneiroBrazil

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