ELECTROCHEMICAL BEHAVIOR OF TITANIUM ELECTRODE IN AQUEOUS BROMIDE SOLUTIONS

The behavior of Ti electrode in some bromide solutions of HBr, NaBr and MgBr2 was studied using different techniques (open circuit potential, potentiostatic, potentiodynamic and galvanostatic polarization). The obtained results revealed that in the three different bromide solutions there was a tendency of Ti for passivation. Titanium was susceptible to pitting corrosion in aqueous bromide solutions under potentiodynamic technique. The oxide film stability was affected by the nature of the electrolyte, scanning rate and applied potential. Also, a steady state Ti/ TiO2 electrolyte system was observed. The oxide film thickness and the formation rate reached their highest values in MgBr2 solutions.