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首页> 外文期刊>International Journal of Electrochemical Science >Surface Modification of Iron for Corrosion Protection: Kinetics of Anodic Film Formation and Electroreduction
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Surface Modification of Iron for Corrosion Protection: Kinetics of Anodic Film Formation and Electroreduction

机译：铁的表面改性以防腐蚀：阳极成膜和电还原的动力学

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The surface modification of Armco iron for corrosion protection was performed by using theformation of the passive oxide film as well as the surface treatment by an ionic liquid. The bandstructure model was employed to explain the kinetics of oxide film growth and reduction in terms ofpoint defects diffusivity. Low values of the diffusion coefficient and the concentration of anionvacancies as well as the high charge transfer resistance values point to high protecting properties of thepassive oxide film in the wide potential range. Protection efficiency of the spontaneously formed oxidefilm at the open circuit potential (EOCP) was markedly enhanced by adsorption of 1-butyl-3- + methylimidazolium ([C4MIm] ) cations on a negatively charged iron surface. The nature and thechemical composition of the surface oxide film on iron in the dependence of the formation potentialwere studied by X-ray photoelectron spectroscopy (XPS). XPS results showed a clear lowering of theiron valence through the oxide film until metallic iron.
机译：通过使用钝化氧化膜的形成以及通过离子液体进行的表面处理，对用于腐蚀防护的Armco铁进行了表面改性。用能带结构模型从点缺陷扩散率的角度解释了氧化膜生长和还原的动力学。扩散系数和阴离子空位浓度的低值以及高的电荷转移电阻值表明在宽的电位范围内无源氧化膜的高保护性能。通过在带负电的铁表面吸附1-丁基-3- +甲基咪唑鎓（[C4MIm]）阳离子，可以显着提高开路电势（EOCP）下自发形成的氧化膜的保护效率。通过X射线光电子能谱（XPS）研究了铁表面氧化膜的性质和化学组成与形成电位的关系。 XPS结果表明，直至金属铁，其氧化物价均明显降低。

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