Abstract
A three dimensional boundary element method was developed for predicting electro-galvanic field responses due to anodic-cathodic interaction. Although the governing equation is linear (Laplace), the boundary condition, which is enforced based on experimentally determined polarization curves, is generally non-linear. Therefore, Newton-Raphson iterative procedure was employed in the present prediction method. An experiment was also conducted on galvanic corrosion of a cylindrical vessel which was made of cast iron and stainless steel, and filled with 0.0165% NaCl solution. In addition, the effect of cathodic protection by placing a small piece of aluminum plate on the cylindrical vessel was examined experimentally. The validity and usefulness of the present prediction method were demonstrated by comparing the calculated results and the experimental data.
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