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用显微照相和SEM技术研究铁的阳极过程

王超 , 陈慎豪

腐蚀科学与防护技术

利用显微照相和SEM技术研究了铁在硫酸溶液中的阳极过程.在预钝化区,观察到电极表面有一层银白色预钝化膜.XPS表面分析证明此膜很可能是Fe(OH)2.显微照相技术对于研究电极过程是一种十分有效的方法。

关键词: 显微照相 , SEM , iron , anodic process

EIS ANALYSIS ON THE ANODIC PROCESS OF ZINC IN AN ALKATLINE SOLUTION

Y.Zheng

金属学报(英文版)

The EIS on the anodic process of pure Zn in an alkaline solution were performed and fitted using the expression of Faradic admittance, based on which the mechanism of the process was proposed. The results showed that besides electrode potential E the electrochemical reaction rate was affected by the adsorption of Zn(OH)ads on the electrode surface and the diffusion of in the electrolyte in active region, and only by the covering of passivation layer on the electrode surface in both transitive and passivation regions. The equivalent circuits applied in these various circumstances were proposed and the variation of some parameters and state variables was also discussed.

关键词: Zn , null , null

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