Qingyang Li, Dahai Zeng*, Maozhong An*, Elevating the photo-generated cathodic protection of corrosion product layers on electrogalvanized steel through nano-electrodeposition, Chemical Physics Letters, 2019, 722: 1-5.
发布日期: 2019-07-13 发布者: 郑洋 阅读: 32

Abstract

The anticorrosion property of electrogalvanized steel mainly depends on the physical barrier of zinc’s oxides or corrosion products to aggressive environments, which has reached a consensus for a long time. In this work, we demonstrated that the corrosion products (mainly ZnO) not only played a role of barrier layer in resisting seawater corrosion, but also provided an additional 30% of photo-generated cathodic protection for zinc coating under sunlight illumination according to the Stern-Geary resistance results. Then, we further elevated this sunlight-induced protection efficiency to approximately 100% by electrodeposition of nanocrystalline zinc, and analysed its improvement mechanism.