Abstract
In this work a corrosion resistance study of porous layers formed on Ti in anodic oxidation process was shown. The anodic oxidation process was realized from moderate 30 V to high 240 V potentials. As the electrolytes, a mixtures of 2M H3PO4 and 0.2–2 wt % HF were applied. The corrosion resistance of the layers was investigated with respect to possible hard tissue implant applications, which means that surface, which provide porosity for osseointegration should possess high corrosion resistance, too. We have applied XRD and SEM techniques for surface characterization. The corrosion resistance was investigated in Ringer’s electrolyte using potentiodynamic method. For corrosion parameters determination, polarization curves were analyzed. Linking the structure, morphology and corrosion resistance gives conditions, which could be optimal for the implant surfaces. The structure, morphology and corrosion resistance of the anodized layers are strongly correlated with the processing conditions. We found that for possible hard tissue implant applications best morphology and corrosion resistance show Ti oxidized at 210 V in 2M H3PO4 + 0.2 wt % HF electrolyte.
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