A potential attenuation equation for cathodically polarized pipelines and risers

摘要

The cathodic protection system analysis as tools for one-dimensional pipelines and risers was modeled and derived incorporating the relevant resistance terms. The new expression pertains to pipelines with superimposed anodes. Comparisons were made between the potential attenuation projected by the new expression, the classical equation of Uhlig and the boundary element modeling technique. It was confirmed that the newly derived equation is more conservative than the boundary element modeling technique due to its consideration of the metallic path resistance and the Uhlig equation because of its consideration of the anode resistance.