Cathodic protection (CP) has been developed greatly both in the application and advanced technologies in recent years. Firstly, the numerical simulation and optimization design technology has been developed rapidly by combining advanced analysis & measuring techniques. Secondly, the application of CP probe monitoring and wireless transmission technology improves the level of CP maintenance greatly.
Simultaneously, with rapid development of oil & gas pipelines, high voltage grid and urban rails, AC and DC stray current interferences are becoming more severe, and present new challenges to the traditional CP technologies. In solving these problems, corrosion theory, evaluation system and mitigation technology of AC & DC stray current interference have been developed. Fourthly, a new cathodic protection—photoproduction cathodic protection attracted attention in recent years and some research work on performance of semiconductor has been explored. The latest progress on the above CP technologies is introduced and the development trends are predicted in this paper.