The effect of hydrogen peroxide on the electrochemical behavior of Ti and some of its alloys for dental applications

Abstract

The electrochemical behavior of titanium and two of its alloys in artificial saliva containing hydrogen peroxide (H 2O 2) was studied using open-circuit potential, polarization and electrochemical impedance spectroscopy measurements. The addition of H 2O 2 caused a decrease in the corrosion resistance and an enhanced dissolution/oxidation rate. Using a two-layer model of the oxide film, it was concluded that the addition of H 2O 2 made the inner layer more defective and the outer layer thicker and porous. Ti has more resistance to H 2O 2 than its alloys. This effect depends on the H 2O 2 concentration and the pH value of the solution.