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Aluminium hydroxide growth on aluminium surfaces exposed to an air/1% NO2 mixture

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Abstract

Aluminium samples were exposed to a mixture of 1% NO2 in air at 100%, 52% and <5% relative humidity. Auger electron spectroscopy depth profiling showed that for the 100% and 52% r.h. environments, the thickness of the surface oxide/hydroxide layer increased linearly with exposure time. X-ray photoelectron spectroscopy was used to study the surface composition as a function of exposure time. The XPS data clearly showed that a transformation from AlOOH to Al(OH)3 was occurring with time for high humidity exposures. Thick hydroxide layers which formed after prolonged exposure, were also analysed with scanning electron microscopy, thermogravimetric analysis, and X-ray diffraction.[/p]

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Authors and Affiliations

  1. University of Dayton Research Institute Dayton, 45469, Ohio, USA

    T. N. Wittberg & J. Douglas Wolf

  2. National Bureau of Standards, Institute of Materials Science and Engineering, 20899, Gaithersburg, Maryland

    Pu Sen Wang

Authors
  1. T. N. Wittberg
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  2. J. Douglas Wolf
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  3. Pu Sen Wang
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Wittberg, T.N., Douglas Wolf, J. & Wang, P.S. Aluminium hydroxide growth on aluminium surfaces exposed to an air/1% NO2 mixture. J Mater Sci 23, 1745–1747 (1988). https://doi.org/10.1007/BF01115716

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  • DOI: https://doi.org/10.1007/BF01115716

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