It has long been recognized that impressed current can offer significant economic advantages over galvanic anodes on certain types of offshore platforms that require a cathodic protection retrofit. In many cases however, these advantages have been cancelled out by poor performance of impressed current systems, q-his paper will review some historical design philosophies and discuss good and not so good
points regarding the efficiency and reliability of the systems. Newer designs will be compared, and some project economics will be presented.
Keywords: Offshore CP, CP Retrofit, Impressed Current, Platform CP