Interactive Resource icon  Surface Defects and Flaws

 
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Resource type: Interactive Resource
Description: This animation is a schematic explanation of possible defects and flaws, which affect the protectiveness of the air formed alumina film. They can be classified into two groups:defects introduced during processing and handling, such as scratches, macro-roughness (e.g. roll marks), millscale and process lubricants; and defects related to the bulk microstructure such as: cellular/dendrite boundaries, grain boundaries, intermetallics. The total area occupied by such defects is low, (in 99.99 % Al it is only 0.2 % of the surface); however it still bears a large impact on the corrosion performance and durability of the aluminium.
Keywords: alumina film • defects • microstructure • processing
Categories: Science approaches > Structure, bonding & defects
Science approaches > Microstructure
Science approaches > Corrosion & degradation
Materials > Ceramics & glasses > Technical ceramics > Alumina
Materials > Metals & alloys > Aluminium & alloys
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: 24 March 2005
Date added: 07 July 2010
Package:
Resource ID: 2860