Cyclic voltammetry and polarization curves were used for a study of the electrochemical reaction mechanism of the NiTi alloy in the methanol-perchloric acid system. The anodic polarization curves and the Tafel curves were obtained. The dynamic parameters of the anodic NiTi are: a: 5.0805, b: 1.1958, i(0): 5.6416 x 10(-5) A/cm(2), n beta: 0.048. The results of cyclic voltammetry show that NiTi alloy dissolves in the solution as an intermetallic instead of titanium and nickel separately, and that the anodic reaction of the NiTi alloy in the system is an irreversible process, the anodic peak on the CV curve corresponds to an one-step oxidation process involving seven electrons, and the anodic reaction is NiTi - 7e -> T14(+)+Ni3(+) followed by a reduction process Ni3(+) e -> Ni2(+).

Keywords: nitinol; electrochemical reaction mechanism; electropolishing