Patent ID: 8298397
Filing Date: 2012-10-30
Classification: C23F,G01N

Abstract:
1. A method for corrosion protection in a marine construction, such as a marine surface vessel or a marine structure, the marine construction comprising a plurality of metal elements and at least two reference electrodes, the metal elements and the reference electrodes being at least partly immersed in an electrolyte in the form of water, in which the marine construction is at least partially immersed, the metal elements comprising an anode and a metal part, the anode being provided for corrosion protection of the metal part by the provision of an electrical protection current through an electrical circuit comprising the anode, the metal part and the electrolyte, the method comprising: measuring an electric potential of the metal part with the reference electrode as a ground reference, connecting at least one of the metal elements and at least one of the at least one reference electrode to a DC electrical power outlet so as to allow an electrical regeneration current through an electrical circuit comprising the at least one of the metal elements the at least one of the at least one reference electrode and the electrolyte, so as for the reference electrode to be anodized, measuring separately the electric potential of one of the metal elements with a respective of at least two reference electrodes asa ground reference, and connecting at least one of the metal elements and at least one of the reference electrodes to the DC electrical power outlet, if the electrical potential measured with one of the reference electrodes differs substantially from the electrical potential measured with another of the reference electrodes.