Bioactivity Performance of Pure Mg after Plasma Electrolytic Oxidation in Silicate-Based Solutions

The biodegradable metals, including magnesium (Mg), are a convenient alternative to permanent metals but fast uncontrolled corrosion limited wide clinical application. Formation of barrier coating on Mg alloys could be successful strategy for the production stable external layer that prevents corrosion. Our research was aimed develop an oxide using plasma electrolytic oxidation (PEO) in silicate-based solutions. 99.9% pure alloy anodized electrolytes contained mixtures sodium silicate and fluoride, calcium hydroxide hydroxide. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), contact angle (CA), Photoluminescence analysis immersion tests were performed assess structural long-term properties new coating. Biocompatibility antibacterial potential evaluated U2OS cell culture gram-positive Staphylococcus aureus (S. aureus, strain B 918). PEO provided formation porous with relatively high roughness. It shown Ca(OH)2 crucial compound surface modification implants, treated method. addition Ca2+ ions resulted more intense growth higher active area. Cell experiments demonstrated appropriate adhesion all investigated coatings significantly better proliferation rate samples Ca(OH)2-containing electrolyte. In contrast, NaOH-based electrolyte relevant effects did not support proliferation. conclusion, it should noted baths containing biocompatible used development commercial degradable implants.