用显微照相和SEM技术研究铁的阳极过程

STUDY ON THE ANODIC PROCESSES OF IRON BY PHOTOMICROGRAPHY AND SEM TECHNIQUE

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。

The anodic processes of irondectrode in sulhric acid sohtions are studied by using photomicrography and SEM techniques.In prepassive region a silvery film is found on the iron electrode surface.XPS analyses indicated that this film Was probably composed of Fe(OH)2instead of FeSO4.Under the experiment condition,a prepassive mechanism is proposed.Photomicrography is a very useful and in situ tool in studing electrode process.