Investigation of Electrochemical Behaviour of Pure Commercial Ti in H2SO4 Solutions

In this study، the electrochemical behaviour of pure commercial Ti in 0. 1، 1. 0 and 3. 0M H2SO4 solutions has been examined. The polarization curves suggested that pure commercial Ti showed excellent passive behaviour in 0. 1، 1. 0 and 3. 0M H2SO4 solutions. Mott–Schottky analysis showed that passive films formed on pure commercial Ti، are n-type semiconductor. For three solutions، Mott–Schottky analysis showed two positive slopes in the passive region. Also، this analysis indicated that the donor densities (ND1 and ND2) are in the range 1020 cm-3 and increased with solution concentration. Based on the EIS analysis، it was shown that the polarization resistance decreases with solution concentration.