The Influence of Sodium Chloride on the Resulting AAO Film Thickness

Abstract:

The contribution examines the effects of the electrolyte chemical composition on the resulting AAO layer thickness, which is one of the main indicators of corrosion protection of aluminium parts and which also favourably affects mechanical properties of component surfaces. For comparison purposes, there were selected the electrolytes comprising sulphuric acid, oxalic acid, boric acid and sodium chloride. Anodizing time for all specimens was 210.00 minutes. At the same time, equal electrolyte temperature 22.00°C ± 13.64% as well as equal magnitude of the applied voltage 12.00 V ± 4.17% were determined for all specimens. The results obtained lead to the assumption that it is possible to replace conventional electrolytes by those that are more environmentally friendly, reduce the costs of their disposal and allow obtaining oxide layers of the same thickness. The admixture of sodium chloride plays here the crucial role and its effect on the thickness of the formed oxide layer has not been published yet in any study.

• Periodical: Advanced Materials Research (Volumes 816-817)
• Pages: 18-22
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.816-817.18
• Online since: September 2013
• Authors: Miroslav Badida, Miroslav Gombar, Lydia Sobotova, Jan Kmec, Alena Vagaská, Peter Michal
• Keywords: AAO Film Thickness, Anodic of Aluminium, Electrolyte

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