Two types of impressed current cathodic protection and a sacrificial method were used to protect over 100000m2 of reinforced concrete caissons and deck slab of a new ship repair yard. This paper describes the CP and monitoring systems used and compares the monitoring results from the different types of system and probe.
An effective and efficient impressed cathodic protection system by laying a continuous shallow anodes bed in close proximity to the tank foundation. Some of the merits of this installation include elimination of shielding effects or interference from other structures and uniform protection of the entire tank bottom.
There is big initial and small mean current density for offshore platforms. Sometimes the former is twice of the latter. DNV-RP-B401 suggests minimizing anode size and density. NACE-RP-0176 recommends utilizing more anodes. This paper introduces a new method by wing section sacrificial anode with large surface area in the initial period.
For reinforced concrete (RC) structures that are in drier locations but still need of cathodic protection (CP), impressed current cathodic protection (ICCP) systems are preferred. In this study, the performance of activated zinc anodes installed on dry or high resistance concrete on Florida Bridges was evaluated.