Aluminium alloy sacrificial anodes are often used to protect marine structures due to their high electrochemical properties. Anodes are often immersed in seawater when the tank is ballasted and dry with the tank empty. We study the properties of an Al-Zn-In-Cd alloy anode with cyclic immersion in seawater in the laboratory.
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.