Investigation of corrosion behavior of galvanized steel as submarine cable armor in seawater under weak magnetic fields

Submarine cables are the main transmission channel for offshore wind power technology. In the actual work of submarine cables, it is inevitable that an induced magnetic field will be generated in the submarine cable armor. The induced magnetic field generated will have a certain impact on the corrosion of the submarine cable armor, thus affecting the service life of the submarine cable. In this paper, the corrosion behavior of submarine cable armor with galvanized steel structure in seawater under different weak magnetic fields is investigated by electrochemical corrosion experiments. The results show that the galvanized layer does not play a protective role when the structure of submarine cable armor is damaged, and the magnetic field environment plays a role in promoting the corrosion behavior of submarine cable armor. Through the analysis of its corrosion mechanism, it is found that the magnetic field promotes the corrosion behavior of submarine cable armor by affecting charge transfer and the formation of corrosion products, which provides a reference for the accurate evaluation of the actual service life of submarine cable.