Enhancement of Corrosion Resistance of PEO Coating on AZ91 Biomedical Magnesium Alloy by Surface Laser Treating

Abstract:

Ceramic coating was fabricated on AZ91 biomedical magnesium alloy by plasma electrolytic oxidation. The coating was then subjected to surface laser treating, and the influence of laser treating on the morphologies and corrosion resistance of the coating were investigated. The results showed that PEO coating without laser treating showed coarse and porous surface and the pores on coating surface were big. When subjected to laser treating, the pores on coating surface became little and few. The corrosion tests in SBF indicated that corrosion resistance of PEO coating on magnesium alloy sample could improve the corrosion resistance of the substrate, and surface laser treating could further increase the corrosion resistance.

• Periodical: Applied Mechanics and Materials (Volumes 365-366)
• Pages: 1110-1113
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.365-366.1110
• Online since: August 2013
• Authors: Miao Wang, Yun Long Wang, Zhong De Liu, Hua Ding
• Keywords: Biomedical Magnesium Alloy, Corrosion Resistance, PEO Coating, Surface Laser Treating, Surface Morphology

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