As everyone knows, there is the contradiction of big initial and small mean current density for offshore platform, sometimes the former is twice of the latter. DNV-RP-B401 suggests minimizing the anode size to meet the bigger initial current density, and NACE-RP-0176 recommends utilizing utilizingutilizingutilizingutilizing utilizing more anodes. This paper introduces a new method to address this problem by wing section sacrificial anode with large surface area at initial period. Experiment results showed that the wing section sacrificial anode can output 30-40% more current density than the long slender stand-off, while L ≥ 4r.
Key words: downloadable, wing section, sacrificial anode, big initial current, small mean current, optimization, cathodic protection, CP design, offshore platform