Abstract

Modern cathodic protection design applications involve the use of the potential theory for estimating the current and potential distribution on complex steel structures immersed in seawater and buried in soil. Solution of Laplace's equation to satisfy nonlinear, time-dependent boundary conditions is achieved by use of Green's third identity, which reduces the problem for the electrolyte volume to that of the structure surface, allowing numerical solution of the surface equation by the boundary element method. The paper summarizes the theoretical background, the numerical approach and case studies for cathodic protection design applications.

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