抄録
This paper presents a boundary element application to determine the optimum impressed current densities and optimum location of electrode in a cathodic protection system. The potential within the electrolyte is described by Poisson's equation with nonlinear boundary conditions which are enforced based on experimentally determined electrochemical polarization curves. The optimal impressed current densities are determined in order to minimize the power supply for protection under the protecting conditions that the electric potential of every part of the structure to be protected should be less than some critical value. The solution is obtained by using the conjugate gradient method in which the protecting conditions are taken into account by the penalty function method. The boundary element method is employed to discretize the governing equations. Several numerical examples are presented to demonstrate the practical applicability of the pro-posed method.
