Abstract
Optimization of cathodic protection systems for a pipeline and a ship was performed by using the boundary element method (BEM). For a pipeline, the location and impressed current of electrodes in a cathodic protection system were optimized by minimizing the electric power necessary to keep the potential on the metal surface below a critical value. The non-uniformity of soil conductivity and the resistance of a long pipeline were taken into account. For a ship, an inverse problem to estimate the potential distribution on the whole surface of the hull from the electric potential data measured with several sensors was solved at first. Then, the optimum current to be impressed to each electrode located on the hull was determined by using the results of the inverse analysis.
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