Corrosion resistance of magnesium alloy with zinc coating applied by magnetron sputtering
DOI:
https://doi.org/10.54708/26587572_2026_822529Keywords:
magnesium alloy, zinc coating, cathodic coating, magnetron sputtering, biodegradability, corrosionAbstract
Magnesium is a promising material for biodegradable implants. However, this metal and its alloys have a significant drawback that hinders their medical application. The dissolution rate of magnesium prevents the use of magnesium‑based products as implants. The increased corrosion rate does not ensure the required service life of the alloys due to premature failure. Loss of implant integrity compromises the required mechanical properties, leading to a risk of repeated bone tissue deformation. To address this drawback, in addition to alloying and deformation processing of the material, a protective coating is applied. The coating is intended to reduce the corrosive activity of the magnesium alloy serving as the substrate. The protective layer was deposited by magnetron sputtering in a vacuum. Tests were conducted in Ringer’s solution; corrosion activity was studied based on the rate of hydrogen evolution during sample dissolution followed by calculation of the corrosion rate. The results showed that the zinc coating deposited by magnetron sputtering in a vacuum exhibits a subsurface degradation pattern. The selected deposition conditions significantly affect the thickness of the resulting films, which alters the corrosion properties of the coating. Zinc sputtering onto magnesium provides short‑term protection due to the barrier effect and the cathodic action of zinc, which is of interest for medical applications.References
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