论文部分内容阅读
本文应用电化学及俄歇电子能谱等技术,研究了离子束混合对铁的水溶液腐蚀行为的影响,旨在探讨离子束混合作为一种材料表面改性的新途径,用于提高纯铁腐蚀性能的可能性。电化学动电位扫描的结果表明,纯铁表面真空沉积铬薄层(～400),经氩离子束轰击混合后,其阳极致钝电流密度(I_i)和维钝电流密度(I_m)较混合前均有数量级的降低,此种腐蚀性能改进的效果随轰击剂量的增加而增加。钝化膜的俄歇电子能谱分析结果表明,腐蚀性能的改进可归因于表面形成了一层富铬的以氧化膜为主的钝化膜,也与混合界面上形成的亚稳相有关。同时,发现经氩离子轰击后,在混合层及其附近的铁衬底中产生了“氩泡”为主的物理损伤.
In this paper, electrochemical and Auger electron spectroscopy techniques were used to study the effect of ion beam mixing on the corrosive behavior of iron in aqueous solution. The purpose of this study was to explore ion beam mixing as a new way to modify the surface of iron to improve the corrosion of pure iron Possibility of performance. Electrokinetic potentiodynamic scanning results showed that the pure iron surface was vacuum deposited chromium thin layer (~ 400), mixed by argon ion bombardment, the anode dull current density (I_i) and the dimension of the blunt current density (I_m) mixed Before the order of magnitude decreased, the effect of such corrosion improvement with the bombardment dose increases. Auger electron spectroscopy analysis of the passivation film shows that the improvement of the corrosion performance can be attributed to the formation of a chromium-rich oxide film-based passivation film on the surface and to the metastable phase formed on the mixed interface . At the same time, it was found that after argon ion bombardment, “Argon bubble” was the main physical damage in the mixed layer and its nearby iron substrate.