THE CORROSION OF TITANIUM AND UNCONVENTIO NAL TITANIUM-ALLOYS IN RINGER SOLUTION

The results of the electrochemical tests on Ti binary Ti-Mo and ternar y Ti-AI-Mo alloys in physiological environment are presented. Short te rm tests were used to establish the compatibility of these materials w ith biological liquid (assimilated with Ringer's electrolyte) ia order to use them as clinical implants. Corrosion potentials and dissolutio n currents through passive films were used for evaluation of surface s tability and localized corrosion susceptibility (crevice and different ial aeration) after short time (2h) contact with physiological environ ment. The obtained results show that the corrosion resistance is contr olled by the characteristics of surface films (composition, degree of hydration) and the pH of the solution.