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Two-dimensional pitting corrosion of aluminium thin layers

Author

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  • Balázs, L.
  • Gouyet, J.-F.

Abstract

The influence of Cl− and Fe3+ ions on the morphology of pits grown in aluminium thin films was investigated. Under open circuit conditions various morphologies ranging from percolation-cluster-like patterns to dense holes with smooth perimeters were observed. Temporal fluctuations in the free corrosion potential did not reflect significant differences in pit shapes. The growth of two-dimensional pits is likely to be influenced by two main factors: (a) local fluctuation in the electrolyte aggressiveness due to copious hydrogen bubbling at dissolution sites; (b) global restriction of pit growth imposed by the cathodic reactions occurring on the oxidised surface. A spreading percolation model with feed-back is able to reproduce all the morphologies observed and provides a possible explanation to the 1/f2 character of the potential noise.

Suggested Citation

  • Balázs, L. & Gouyet, J.-F., 1995. "Two-dimensional pitting corrosion of aluminium thin layers," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 217(3), pages 319-338.
    • Handle: RePEc:eee:phsmap:v:217:y:1995:i:3:p:319-338
    DOI: 10.1016/0378-4371(95)00048-C
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    Cited by:

    1. Fabbri, Ricardo & Bastos, Ivan N. & Neto, Francisco D. Moura & Lopes, Francisco J.P. & Gonçalves, Wesley N. & Bruno, Odemir M., 2014. "Multi-q pattern classification of polarization curves," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 395(C), pages 332-339.
    2. Johnsen, T. & Jøssang, A. & Jøssang, T. & Meakin, P., 1997. "An experimental study of the quasi-two-dimensional corrosion of aluminum foils and a comparison with two-dimensional computer simulations," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 242(3), pages 356-376.

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