Abstract—This article introduces several existing detection methods of grounding grid corrosion, such as the method based on electricity network, the method based on electromagnetic theory and the electrochemical-based method. Subsequently, this article provides analysis of these three methods, including analysis and comparison of their advantages and disadvantages. Finally it proposes a new method based on ultrasonic guided wave method and then explores its feasibility and ad-vantages.

Index Terms—Grounding grids corrosion diagnosis, electromagnetic theory, electromagnetic theory, electrochemical method, ultrasonic guided wave.

The authors are with School of Electrical Engineering, Wuhan University 430072 China. (e-mail:chenwenguangc@163.com, 923190217@qq.com, 945681253@qq.com, 83684787@qq.com).