Abstract
Cathodic protection has been applied widely to steel reinforcement in concrete. However, it is generally very difficult to establish optimal corrosion protection for such steel and to precisely evaluate the corrosion protection effect. We constructed the new numerical analysis technique with FEM to optimize the cathodic protection to the reinforcement steel in concrete. We constructed the precise calculation method of the potential-current distribution, which can account for ion migration, ion diffusion, the IR drop inside the anode, and the polarization phenomenon of the anode and reinforcement steel. The effects of the distance between steels and the cover layer thickness of concrete on the cathodic protection current distribution were estimated.
