A Simulation Study of Cathodic Protection of 35-Steel in Seawater by Finite Element Method

Physical models of cathodic protection for 35-steel by aluminum sacrificial anode in seawater were built under different conditions of normal cathodic protection,over-protection and under-protection,respectively.And the weak form of Laplace equation was deduced to make finite element method (FEM) numerical calculation conveniently.The comparison of FEM data and measured experimental data was made by Kriging gridding interpolation.The results show that the potential distributions under three protection conditions simulated by FEM approximated to measured experimental results.