Study on cut-edge corrosion mechanism of galvanized corrosion and improvement of corrosion resistance by utilizing multiphysics analysis

本文主要研究了镀锌钢的刃口腐蚀机理。为了研究锌在1M氯化钠和1M氯化镁中形成的腐蚀产物在钢上的阳极和阴极反应，采用了电化学微电池技术。在钢表面形成的锌腐蚀产物的形态和组成与溶液组成和与镀锌层的距离有关。此外，腐蚀产物的沉积在一定程度上抑制了阴极反应。另一方面，含镁腐蚀产物的析出显著抑制了钢的阳极反应。

This study focused on cut-edge corrosion mechanism of galvanized steels. In order to investigate anodic and cathodic reactions on steels with Zn corrosion products formed in 1 M NaCl and 1 M MgCl2, electrochemical microcell technique was employed. The morphology and compositions of Zn corrosion products formed on the steels depended on solution compositions and the distance from zinc coating layer. In addition, cathodic reaction was suppressed to some extent by deposition of the corrosion products. On the other hand, anodic reaction was suppressed on steel significantly by precipitation of the corrosion products containing Mg.