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.