Effect of micro arc oxidation on micro – structure and electrochemical corrosion performance of cold sprayed aluminum coating
Anti-Corrosion Methods and Materials
ISSN: 0003-5599
Article publication date: 27 September 2018
Issue publication date: 30 October 2018
Abstract
Purpose
To improve the electrochemical corrosion resistance of cold sprayed Al coating.
Design/methodology/approach
A cold sprayed aluminum (Al) coating fabricated on S355 structural steel was oxidized using a micro arc oxidation (MAO). The electrochemical corrosion and impedance spectroscopy were tested to investigate its corrosion performance.
Findings
The MAO film is primarily α-Al2O3 and γ-Al2O3, which increases its density and surface quality. The corrosion potential is positively shifted by 0.2 V, and the electrochemical impedance is significantly increased.
Originality/value
A cold sprayed Al coating on S355 steel was first oxidized using a MAO. The effects of MAO on the microstructure of Al coating were investigated to analyze its electrochemical corrosion behavior.
Keywords
Acknowledgements
Financial support for this research by the Key Research and Development Project of Jiangsu Province (BE2016052) is gratefully acknowledged.
Citation
Jing, Z. and Dejun, K. (2018), "Effect of micro arc oxidation on micro – structure and electrochemical corrosion performance of cold sprayed aluminum coating", Anti-Corrosion Methods and Materials, Vol. 65 No. 6, pp. 572-579. https://doi.org/10.1108/ACMM-05-2018-1942
Publisher
:Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited