Method and system for assessing a metallic structure arranged within an electrolyte

A method for assessing a structure arranged in an electrolyte, the method comprising:

• connecting an electric source between the structure and a low resistive connection to the electrolyte via an earth;
• providing, at least within the structure, a direct current, DC, and/or an alternating current, AC, via the electric source;
• measuring a direct voltage, DC voltage, and an alternating voltage, AC voltage, between a first electrode and a second electrode, the first electrode and the second electrode being in contact with the electrolyte at a measurement location and being arranged at a distance to each other, wherein the first electrode and the second electrode are connected to a voltage measurement device;
• determining a direct potential, DC potential, and an alternating potential, AC potential, between the structure and the electrolyte at the measurement location, wherein determining the DC potential and the AC potential comprises measuring the DC potential and the AC potential between the structure and at least one additional electrode in contact with the electrolyte;
• and
• assessing at least one property of the structure based on the measured DC voltage, the measured AC voltage, the DC potential, and the AC potential,
• wherein the first electrode and the structure are separate components.