... for the cased section of carrier pipe. Furthermore, when the end seals on the casing are compromised, the corrosion threat is increased on the cased section of carrier pipe either due to metallic short or due to electrolytic coupling between the carrier pipe and casing. Pipeline operators in U.S. are mandated...

... in electrolytic coupling between the two pipes. A simplified model is developed to simulate electrolytic coupling between the carrier and casing pipe, and to estimate diversion of the cathodic protection current from the rest of the pipeline for a given set of conditions. This model calculates current densities...