| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1470779 | Corrosion Science | 2009 | 9 Pages |
Abstract
The influence of an anodizing pre-treatment in sulphuric acid is investigated on plasma electrolytic oxidation (PEO) of aluminium in silicate electrolyte under constant rms current. The presence of the anodic film is shown to promote the establishment of a micro-arc regime that is favourable for growth of the PEO coating. The incorporation of the pre-formed film into the coating appears to proceed by thermal transformation of the anodic alumina, accompanied by formation of oxide beneath the pre-formed layer. The final coatings contain α- and γ-Al2O3, with increased concentrations of silicon, sodium and potassium in an outer region of the coating.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
E. Matykina, R. Arrabal, A. Mohamed, P. Skeldon, G.E. Thompson,