Abstract
Abstract Titanium dioxide (TiO 2 ) coating with an enhanced anticorrosion properties and bioactivity was developed by doping it with calcium ions through a sol–gel method. The effect of annealing temperature, anions, as well as calcium ions concentration on microstructural and anticorrosion properties of Ca-doped TiO 2 coatings have been investigated. The phase composition and morphology of the coatings were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The corrosion resistance of M30NW biomedical alloy coated with Ca-doped TiO 2 coatings was evaluated using electrochemical methods in conditions similar to the normal physiological environments (PBS solution, pH 7.4, temperature of 37 °C). The obtained results show that the annealing temperature and the source of calcium ions influence the anticorrosion properties of Ca-doped TiO 2 coatings. The best anticorrosion properties were registered for coatings with the highest concentration of Ca ions. At the same time all the examined coatings presented good bioactivity in SBF solution test.
Published Version
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