Author(s)

J. Trevelyan & H.P. Hack

Abstract

Invited paper Analysis of stray current corrosion problems using the boundary element method J. Trevelyan* & H.P. Hack& ^ Computational Mechanics, Inc., Billerica, Massachusetts, USA ^ Naval Surface Warfare Center, Annapolis, Maryland, USA ABSTRACT Today's offshore and ocean going structures and buried structures are fitted with systems which work to inhibit the rate at which the structure corrodes in the aggressive marine or soil environment. These operate by setting up an elec- trostatic field in the water surrounding the structure which causes a desired volt- age and current density distribution over its surface area. These cathodic protection (CP) systems are carefully designed to offer the structure a uniform protection over its surface with the most economical use of anodes. When a structure which is protected in this way approaches a large block of some metallic or other conducting material, the block can interfere with the operation of the CP system b

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