运用循环伏安和极化曲线法研究了镍钛合金在甲酰胺-氨磺酸体系中的电化学反应机制.对阳极极化曲线和Tafel曲线的研究表明, 镍钛阳极的动力学参数为: a=5.6399, b=0.7229, i0=1.5784×10-8 A*cm-2, nβ=0.08.循环伏安法和XPS研究表明, 在本实验条件下, 镍钛合金在甲酰胺-氨磺酸体系中是以整体的形式, 而不是以钛元素和镍元素分别进行阳极溶解的, 该阳极反应为不可逆过程, 为一步7电子的氧化过程, 该阳极反应为: NiTi - 7e → Ti4+ + Ni3+, Ni3+在酸性溶液中极不稳定, 发生还原过程: Ni3++e → Ni2+.
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