抄録
Electrochemical measurements for titanium in 2N, 1N and 0.5N H2SO4 containing various amounts of dissolved oxygen were carried out. The rest potential of titanium shifted in the positive direction with increasing oxygen content in solution, but it did not depend on the concentration of H2SO4 at the limit of zero oxygen concentration. The above fact suggests evidence for the dissolution mechanism involving {Ti(III)H}ads as an intermediate. It was confirmed from the measurements of anodic and cathodic polarization that the titanium surface was covered by oxide even in the active corrosion region. The coverage of oxide on the surface increased as the electrode potential was raised. The anodic polarization curve of titanium in the solutions containing no oxygen was shown to be obtained by extrapolation for the solution to zero oxygen concentration.
