Journal of Applied Electrochemistry

, Volume 1, Issue 1, pp 19–26 | Cite as

The effect of oxygen and SO3 on corrosion of steels in molten sulphates

  • A. J. B. Cutler
Papers
Received:

Abstract

The corrosion of 18% Cr, 8% Ni steel has been studied in alkali metal sulphate eutectic melts as a function of the partial pressures of oxygen and SO3 in equilibrium with the melt at 873°K. The rate of corrosion has been measured in terms of the corrosion current corresponding to the balanced rates of the anodic and cathodic processes at the unpolarized metal surface. The effect of SO3 on the rate of corrosion is interpreted in terms of its role as an oxidizing agent and also in terms of its effect on the solubility of the corrosion products in the melt. The difference in the relative importance of oxygen and SO3 as the oxidizing agent is interpreted in terms of their different solubilities in the sulphate melt.

Keywords

Oxygen Sulphate Physical Chemistry Partial Pressure Metal Surface 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
This is a preview of subscription content, log in to check access.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    C. H. Liu,J. Phys. Chem. 66, 164 (1962).Google Scholar
  2. [2]
    K. E. Johnson and H. A. Laitinen,J. Electrochem. Soc. 110, 314 (1963).Google Scholar
  3. [3]
    A. J. B. Cutler, A. B. Hart, M. J. Fountain, and N. H. Holland,A.S.M.E. Publication 67-WA/CD-4 (1967).Google Scholar
  4. [4]
    B. W. Burrows and G. J. Hills,Electrochimica Acta 15, 445 (1970).Google Scholar
  5. [5]
    D. M. Wrench and D. Inman,ibid.,12, 1601 (1967).Google Scholar
  6. [6]
    A. Rahmel,ibid.,13, 495 (1968).Google Scholar
  7. [7]
    G. Bombara, G. Baudo, and A. Tamba,Corrosion Science 8, 393 (1968).Google Scholar
  8. [8]
    E. K. Akopov and A. G. Bergman,Russ. J. Inorg. Chem. (Eng. trans.)4, 520 (1959).Google Scholar
  9. [9]
    Joint Army-Navy-Air Force (JANAF) Thermochemical Tables (Dow Chemical Company, Michigan, U.S. 1966).Google Scholar
  10. [10]
    ‘High Temperature Properties and Decomposition of Inorganic Salts’, Part 1, Sulphates (National Bureau of Standards, Washington D.C., 1966).Google Scholar
  11. [11]
    A. W. Coats, D. J. A. Dear, and D. Penfold,J. Inst. Fuel 41, 129 (1968).Google Scholar
  12. [12]
    A. W. Coats,ibid.,42, 75 (1969).Google Scholar

Copyright information

© Chapman and Hall Ltd. 1971

Authors and Affiliations

  • A. J. B. Cutler
    • 1
  1. 1.Central Electricity Research LaboratoriesLeatherheadUK

Personalised recommendations