Article ID Journal Published Year Pages File Type
1611088 Journal of Alloys and Compounds 2014 7 Pages PDF
Abstract

•Plasma electrolytic oxidation used to improve corrosion resistance of 2024-T3 alloy.•A conventional DC source with low applied voltage was considered for PEO.•Use of glycerin was effective in enhancement of corrosion resistance.•The surface morphology indicated coatings have a dense structure without cracking.•Degradation of coatings with immersion time was investigated.

Plasma electrolytic oxidation treatment was performed on 2024-T3 aluminium alloy in a simple and inexpensive electrolyte. It was found that treatment time of 30 min resulted in the most noble corrosion potential and lowest corrosion current density. The surface and cross-sectional morphology indicated that the coating has a dense structure without any cracking. Furthermore, the result of X-ray diffraction analysis indicated that the coating was formed mainly from α-Al2O3, γ-Al2O3, Al3.21Si0.47 and small amounts of amorphous phases. The presence of glycerine in the electrolyte composition resulted in not only stabilising the solution but also improving the corrosion resistance.

Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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