中文摘要：

用磁控溅射技术在玻璃基体上制备由两种相组成（单相和双相）的不锈钢纳米涂层，利用动电位极化、交流阻抗技术及扫描电子显微镜研究两种不锈钢纳米涂层在0．25mol／L Na2SO4＋0．05mol／L H2SO4和0．5mol／L NaCl＋0．05mol／LH2SO4溶液中的电化学腐蚀行为，观察相组成对纳米不锈钢涂层耐蚀性能的影响。结果表明，与不锈钢单相涂层相比．不锈钢双相纳米涂层具有较差的抗局部腐蚀能力，其钝化膜的载流子密度远远大于不锈钢单相钝化膜的载流子密度，使得钝化膜的离子传输能力大大增强，从而降低了钝化膜的稳定性。

英文摘要：

The single-phase （α） and dual-phase （α＋γ） nano-crystalline coatings have been fabricated on glass substrate by DC magnetron sputtering. The electrochemical corrosion behavior of the two nano-crystalline coatings in 0.25 mol/L Na2SO4 ＋ 0.05 mol/L H2SO4 and 0.5 mol/L NaCl ＋ 0.05 mol/L H2SO4 solutions was investigated by using potentiodynamic polarization, EIS and SEM. The results showed that there was a large difference in the corrosion behavior between the single-phase （α） and the dual-phase （α＋γ） nano-crystalline coatings. The dual-phase coating is shown to have exhibited a lower localized corrosion resistance and possessed a less stable passive film than the single-phase coating. A similar two-layer semiconductor passive film was formed on both coatings; however, a great increase in carrier densities could be responsible for the low stability of the passive film on the dual-phase coating.