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A multifunctional titanium dioxide (TiO 2 ) coating was used to provide anticorrosive, antimicrobial, and bioactive properties for the surface modification of biomedical materi‐ als because TiO 2 has a stable bonding structure, photocatalytic characteristics, and nega‐ tively charged surfaces in nature. For successful deposition, an arc ion plating technique was adopted to deposit the TiO 2 coating. The antimicrobial activity values of anatase‐ TiO 2 ‐coated stainless steel specimens against Staphylococcus aureus and Escherichia coli were 3.0 and 2.5, respectively, which are far beyond the value designated in JIS Z2801:2000 industrial standard. TiO 2 coatings on stainless steel also generate an increased (i.e., less negative) corrosion potential and decreased corrosion current in a sodium chloride solu‐ tion, showing a reduced tendency and rate of substrate dissolution as well as a reduced coating of species into the electrolyte. In addition, TiO 2 coatings, especially with rutile phase, satisfied the requirements for activating the biological property of a polymeric polyetheretherketone surface. Therefore, TiO 2 is a promising surface modification for the biomedical materials used in surgical instruments and implants.

Anticorrosive, Antimicrobial, and Bioactive Titanium Dioxide Coating for Surface‐modified Purpose on Biomedical Material