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This study describes the development of advanced protective coatings for magnesium surfaces using plasma electrolytic oxidation (PEO) technology that incorporates bismuth-containing phases. The resulting ceramic-metal hybrid coatings combine multiple functional properties in a single surface treatment. The researchers successfully embedded bismuth phases within the PEO coating structure, creating a multifunctional surface layer on magnesium substrates.
Why it matters
Magnesium alloys require protective coatings due to their high corrosion susceptibility, limiting their use in aerospace, automotive, and biomedical applications. This hybrid coating approach could enable broader adoption of lightweight magnesium components while potentially adding antibacterial properties (bismuth compounds are known for antimicrobial activity) and improved corrosion resistance in a single treatment process.
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