Interactive Resource icon  Surface Defects and Flaws

Use this resource: Use this resource icon
Link to this page:
View at:        
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).
Creative Commons Attribution Non-Commercial No Derivatives logo
You are free:
  • to share – to copy, distribute and transmit the work
Under the following conditions:
  • attribution – You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).
  • noncommercial – You may not use this work for commercial purposes.
  • No Derivative Works – You may not alter, transform, or build upon this work.
View the full legal code here.
Date created: 24 March 2005
Date added: 07 July 2010
Resource ID: 2860