Interactive Resource icon  The Oxide Film

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Description: The good corrosion resistance of aluminium is due to the ability of its surface to become passive. This is because aluminium reacts rapidly with oxygen in the environment to form a thin amorphous air-formed oxide film (also called alumina film, 1-10 nm thickness), which protects the metal from further corrosion. For very smooth surfaces, in the ideal case the aluminium will be protected by a continuous oxide film. This animation gives the chemical composition of the oxide film and demonstrates the effect of self-healing, when the oxide film reforms rapidly in the scratched zone of aluminium surface.
Keywords: oxide film • surface • corrosion resistance
Categories: Science approaches > Corrosion & degradation
Materials > Metals & alloys > Aluminium & alloys
Product Forms > Flat > Foil, film & tape
Properties > Mechanical & thermal > Surface properties
Created by: MATTER, The University of Liverpool
Steven Meijers, Corus
Carlos Caicedo-Martinez, Corus
Contributions: Andreas Blistein, Alcan
Herman Terryn, Vrije Universiteit Brussel (VUB)
Iris De Graeve, Vrije Universiteit Brussel (VUB)
Marc Ryckeboer, Sapa
Published by: European Aluminium Association, Brussels
License: This resource is released under the Creative Commons Attribution Non-Commercial No Derivatives license (2.0 UK: England & Wales).
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Date created: 23 March 2005
Date added: 07 July 2010
Resource ID: 2857