Patent ID: 8317996

Claim:
A method for corrosion protection in a marine construction, such as a marine surface vessel or a marine structure, the marine construction comprising at least one metal element and a sacrificial anode adapted to be at least partly immersed in an electrolyte in the form of water, in which the marine construction is at least partly immersed, the at least one metal element comprising a metal part, the sacrificial anode being provided for corrosion protection of the metal part, comprising connecting at least one of the at least one metal element and the sacrificial anode to a DC electrical power outlet so as to allow an electrical de-passivation current through an electrical circuit comprising the sacrificial anode, the metal element and the electrolyte, the method further comprising measuring an electrical potential of the sacrificial anode with a reference electrode (R) as a ground reference, and determining, based at least partly on the measured electrical potential, whether to perform the step of connecting at least one of the at least one metal element and the sacrificial anode to a DC electrical power outlet.