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Electron Micrographs from Thick Oxide Layers on Aluminium

Nature volume 176, pages 222–223 (1955)Cite this article

Abstract

THE thicker protective coatings of oxide formed on aluminium by anodizing in acid electrolytes have long been of importance in industry. The porous nature of these layers has been indicated by their electrical and adsorptive properties. However, electron microscopic investigation has been almost entirely confined to extremely thin (less than 1µ) oxide layers1 due to the limitations of the transmission method of examination. By using the recently developed evaporated carbon film technique2, we have been able to obtain electron micrographs of both the top surface and the cross-section of thick oxide layers. These clearly show the porous structure.

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References

  1. Fischer, H., and Kurz, F., Korrosion und Metallschutz, 18, 42 (1942). Edwards, J. D., and Keller, F., Trans. Amer. Inst. Min. Met. Eng., 156, 288 (1944). Huber, K., J. Colloid Sci., 3, 197 (1948). Keller, F., Hunter, M. S., and Robinson, D. L., J. Electrochem. Soc., 100, 411 (1953).

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  2. Bradley, D. E., J. Inst. Metals, 83, 35 (1954).

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Authors and Affiliations

  1. Department of Chemistry, Sir John Cass College, London, E.C.3

    C. J. L. BOOKER & J. L. WOOD

  2. Department of Applied Physics, Northampton Polytechnic Institute, London, E.C.1

    A. WALSH

Authors
  1. C. J. L. BOOKER
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  2. J. L. WOOD
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  3. A. WALSH
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BOOKER, C., WOOD, J. & WALSH, A. Electron Micrographs from Thick Oxide Layers on Aluminium. Nature 176, 222–223 (1955). https://doi.org/10.1038/176222a0

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