Abstract
In the present study, FEM simulations have been carried out to have an accurate estimation of the electrical field in the presence of a macro-cell process, taking into account primary and secondary current distribution to update present throwing power equations. The electrochemical boundary conditions were defined comprehensively, and simulations have been performed changing water resistivity, geometry, and oxygen content. The studied systems are galvanic coupling between a stainless steel-carbon steel and also a carbon steel-zinc. As a result, an equation was proposed to predict the surfaces involved in the coupling to have an estimation of the corrosion rate.
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