抄録
Co-B alloy films with B contents of 1wt% and 3wt% were electroless-deposited and their corrosion resistance was evaluated in comparison with polycrystalline Co by measuring the cathodic and anodic polarization curves in deaerated 0.2mol·dm-3 HCl. Values of corrosion current icorr and corrosion potential Ecorr suggested that the corrosion resistance of the Co-B alloy films with 1wt% B was markedly low and that of the Co-B alloy films with 3wt% B was similar to polycrystalline Co. The dissolution mechanisms of the Co and Co-B alloy films were also investigated by surface analysis using XPS, by analysis of the electrolite near the alloy electode during polarization using ICP and by values of Tafel slope b derived from polarization curves.
