An Alternative Approach for Producing Electrolytic Coatings to Enhance Corrosion Resistance of Biodegradable Magnesium Alloy

Authors

  • M.M. Karaś
  • M. Bieda Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Kraków, Poland
  • Ł. Maj Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Kraków, Poland https://orcid.org/0000-0001-8287-0146
  • S. Boczkal Łukasiewicz Research Network – Institute of Non-Ferrous Metals, Light Metals Division, Skawina, Poland https://orcid.org/0000-0002-3421-4723
  • A. Jarzębska Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Kraków, Poland https://orcid.org/0000-0002-5662-6278
  • Z. Zając Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Kraków, Poland
  • B. Augustyn Łukasiewicz Research Network – Institute of Non-Ferrous Metals, Light Metals Division, Skawina, Poland https://orcid.org/0000-0003-3617-1189
  • D. Kapinos Łukasiewicz Research Network – Institute of Non-Ferrous Metals, Light Metals Division, Skawina, Poland
  • K. Limanówka Łukasiewicz Research Network – Institute of Non-Ferrous Metals, Light Metals Division, Skawina, Poland https://orcid.org/0000-0003-0683-6696
  • J. Skiba Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw, Poland https://orcid.org/0000-0002-4232-683X

DOI:

https://doi.org/10.24425/amm.2025.156238

Abstract

A protective coating was developed on a biodegradable MgZn1Ca0.2Li1 alloy via micro-arc oxidation (MAO) method in a KOH + KF electrolyte. The coating, composed of MgF2, KMgF3, and MgO phases, uniformly covers the substrate material, exhibiting moderate surface roughness. Comprehensive analysis using XRD along with scanning and transmission electron microscopy cross-sectional observations, supported by the acquisition of diffraction patterns and EDS spectra, was conducted to confirm the nanocrystalline structure as well as the phase and elemental distribution. Electrochemical tests showed a tenfold decrease in corrosion current and a significant increase in polarization resistance. Hydrogen evolution was effectively suppressed, confirming protective barrier function. The use of environmentally friendly KOH and KF-containing electrolyte ensures the non-toxicity of the deposition process, resulting in the protection of future biodegradable implant surfaces. The results support the potential of this coating for orthopedic applications.

Published

2025-12-22

How to Cite

Karaś, M.M., et al. “An Alternative Approach for Producing Electrolytic Coatings to Enhance Corrosion Resistance of Biodegradable Magnesium Alloy”. Archives of Metallurgy and Materials, vol. 70, no. 4, Dec. 2025, doi:10.24425/amm.2025.156238.

Issue

Vol. 70 No. 4 (2025)

Section

Articles