The primary function of a cathodic protection system used to protect subsea structures in a tidal energy plant is to prevent or significantly reduce corrosion of metallic structures exposed to the marine environment by making the structure the cathode in an electrochemical cell, thereby sacrificing a less noble metal (the anode) to corrosion instead. Corrosion is the degradation of metals through electrochemical reactions with their environment. In the marine environment, saltwater acts as an electrolyte, facilitating the flow of electrons between different areas of a metal surface. This leads to the formation of anodic (corrosion) and cathodic (protected) regions.....
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