Modifying the properties of titanium surface with the aim of improving its bioactivity and corrosion resistance

The paper presents the results of examinations of how the oxidation of titanium in a solution containing calcium and phosphorus ions affects the corrosion resistance and bioactivity of titanium. Prior to examination, the samples were exposed in the simulated body fluid (SBF) at the temperature of 37degreesC for 13 and 1000 h. Then the corrosion resistance was examined by electrochemical methods in SBF at a temperature of 37degreesC. The chemical composition of the surface layers was determined by photoelectron spectroscopy (XPS). The examinations have shown that after the oxidation the corrosion resistance increases. After long-term exposures, calcium phosphates were found on the sample surface, and their amount was bigger on the oxidised surfaces. (C) 2003 Elsevier Science B.V. All rights reserved.