Corrosion behaviour of electropolished magnesium materials

Kloiber J, Schultheiß U, Sotelo L, Sarau G, Christiansen S, Gavras S, Hort N, Hornberger H (2024)

Publication Type: Journal article

Publication year: 2024


Book Volume: 38

Article Number: 107983

DOI: 10.1016/j.mtcomm.2023.107983


Although magnesium and its alloys are promising candidates as biodegradable implant materials, the tendency for localised corrosion mechanism in physiological environment limit their biomedical application. Electropolishing is an attractive strategy for improving the corrosion behaviour of metals, but it is still largely unexplored in magnesium materials. In this study, the characterisation of electropolished surfaces of AM50 and pure magnesium was performed, focussing on their in vitro degradation behaviour in cell medium. Corrosion rates were evaluated using potentiodynamic polarisation. The surface morphology before and after the onset of corrosion was investigated by scanning electron microscopy and confocal laser scanning microscopy. The presented electropolishing process led to improved surface performances, observable by significantly lower corrosion rates (0.08 mm·year−1 in Dulbecco's modified Eagle's medium), lower arithmetical mean height (0.05 µm), lower water contact angle (25–35°) and lower micro hardness (35–50 HV 0.1) compared to mechanically and chemically treated surfaces. MgO/Mg(OH)2 could be detected on electropolished surfaces. The localised corrosion mode could be reduced, but not entirely prevented. Electropolishing shows great potential as post-treatment of magnesium-based components, but detailed tests of the long-term corrosion behaviour are an important area of future research.

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How to cite


Kloiber, J., Schultheiß, U., Sotelo, L., Sarau, G., Christiansen, S., Gavras, S.,... Hornberger, H. (2024). Corrosion behaviour of electropolished magnesium materials. Materials Today Communications, 38.


Kloiber, Jessica, et al. "Corrosion behaviour of electropolished magnesium materials." Materials Today Communications 38 (2024).

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