Implementation and validation of boundary element method for corrosion protection
Stefan de Gijsel (TNO)
Nick J. Schilder (TNO)
Frits Kernkamp (TNO)
Bart Jan Peet (TNO)
Eugene Lepelaars (TNO, TU Delft - Electrical Engineering, Mathematics and Computer Science)
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Abstract
A boundary element method was developed to estimate electric potential and current density distribution around a ship hull. The model can be used for corrosion diagnosis and the estimation of coating damage. The implementation includes fast analytical integral computations, discontinuous elements, a damped Newton-Raphson method for non-linear boundary conditions due to polarization curves, support for stratified conductivity and an iterative method to simulate impressed current cathodic protection behavior. The model was validated using an analytical benchmark with two cylinders. Furthermore, the model was validated experimentally using a ship scale model, with good results. This model may find useful applications in corrosion diagnosis and coating damage estimation.