Cathodic protection (CP) prevents corrosion of subsea wellhead equipment by making the metal structure the cathode in an electrochemical cell, thereby suppressing the anodic reactions that cause corrosion. Corrosion is an electrochemical process where metal atoms lose electrons and become ions, leading to the degradation of the metal. CP works by supplying electrons to the metal structure, shifting its electrical potential to a more negative (cathodic) level. This makes it thermodynamically unfavorable for the metal to corro....
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