Failure of Impressed Current Anode Supports on Jetty Piles

摘要

Impressed current cathodic protection was installed on the coated piles of a jetty. The anodes were placed within galvanized steel support tubes that were welded to the piles. The anodes were isolated from the ends of the tubes, but a small portion of the anodes extended from each tube. After about a year, most of the support tubes had corroded and broken because of severe splash zone corrosion and the formation of hypochlorous acid (HOCI) from anodic reactions. Proper installation of anodes would have prevented this failure.