A Novel Micro-Arc Anodising Process for Aluminium Alloys Containing High Silicon

Shi, Z. and Zhang, M.X. (2009) A Novel Micro-Arc Anodising Process for Aluminium Alloys Containing High Silicon. Materials Science Forum, 618-619 279-282. doi:10.4028/www.scientific.net/MSF.618-619.279


Author Shi, Z.
Zhang, M.X.
Title A Novel Micro-Arc Anodising Process for Aluminium Alloys Containing High Silicon
Journal name Materials Science Forum   Check publisher's open access policy
ISSN 0255-5476
Publication date 2009
Year available 2009
Sub-type Article (original research)
DOI 10.4028/www.scientific.net/MSF.618-619.279
Volume 618-619
Start page 279
End page 282
Total pages 4
Editor Dargusch, M.S.
Keay, S.
Place of publication Switzerland
Publisher Trans Tech Publications Ltd
Collection year 2010
Language eng
Subject 8612 Fabricated Metal Products
091207 Metals and Alloy Materials
C1
Abstract Although the anodising process has been widely used in surface treatment of AI alloys, the well known sulphuric acid anodising process produces inhomogeneous and highly porous anodised coatings on Al alloys containing high Si due to the inertness of the silicon particles. The present work reports a novel micro-arc anodising process for such high-silicon aluminium alloys. Uniform and thick anodising coatings can be obtained through an anodising process in an alkaline electrolyte under high voltage and low current density conditions. The microstructure examination in SEM indicates that most pores in the coatings have been sealed during the anodising process, thus post-treatment that is normally needed for the currently used anodising process can be eliminated. The coating is very promising in the improvement of corrosion resistance for cast high-silicon aluminium alloys.
Keyword Oxidation
micro-arc anodiation
alkaline electrolyte
high-silicon Al alloy
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Mechanical & Mining Engineering Publications
 
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Created: Thu, 11 Mar 2010, 11:14:20 EST by Sally Beard on behalf of School of Mechanical and Mining Engineering