Evaluating the Electrochemical and In Vitro Degradation of an HA-Titania Nano-Channeled Coating for Effective Corrosion Resistance of Biodegradable Mg Alloy

Extensive research into magnesium (Mg) alloys highlights their possible applications in the field of biodegradable implants. As are highly electronegative, it is imperative to tailor degradation rate for clinical safety. Surface coatings have been widely used corrosion protection Mg alloys, but presence spatial defects limits effectiveness. An innovative and near-defect-free hydroxyapatite (HA)-TiO2 nano-channeled (TNC) coating architecture has developed on ZM21 alloy present study by combining anodization sol-gel dip technique. The HA-TNC positively shifted Ecorr from ?1.38 ?0.61 V. Accordingly, current density (Icorr, 5.8 × 10?6 A/cm2) was suppressed 53.4 times compared uncoated alloy. polarization resistance (Rp) charge transfer (Rct) values highest among all other samples, indicating superior shielding ability coating. During vitro immersion up 28 days simulated body fluid (SBF), HA?TNC maintained lowest hydrogen evolution (HER) 1.10 ± 0.22 mg/cm2/day 1.83 0.41 mL/cm2/day, respectively. A compact structurally stable 2D plate-like HA (Ca/P:1.55), mineralized HA-TNC-coated ZM21, provides effective against penetration aggressive ions with prolonged SBF immersion. findings provide a rational design development bioactive ceramic Mg-based bioimplants.