Corrosion Resistance of Different Coatings on Titanium Surface: A Systematic Review

Titanium is widely used in dental implants due to its excellent mechanical and biocompatibility, but it is susceptible to corrosion in the oral environment. Various surface coatings have been developed to enhance corrosion resistance. This study evaluated the corrosion resistance of different surface coatings on titanium by comparing electrochemical corrosion parameters and examining the influence of coating related mechanical properties. Following PRISMA guidelines, eligible studies were in vitro investigations of surface coatings on Grade 4 titanium or Ti‐6Al‐4V reporting corrosion related outcomes published up to 2025, resulting 22 studies being analyzed. Risk of bias was assessed using the QUIN Tools. All included studies compared coated titanium surfaces with uncoated controls. Quantitative evaluation using corrosion current density, corrosion potential, and polarization resistance showed improved corrosion resistance and surface stability. Several coatings reduced metal ion release, demonstrating potential for enhancing titanium implants in vitro, with carbon‐based coatings showing particularly promising protection and mechanical properties.