The term "cathodic" refers to anything related to the cathode, which is the electrode in an electrochemical cell where reduction occurs. In simple terms, it is the part of the cell that gains electrons during a chemical reaction. This process is essential in various applications, including batteries and electroplating. In the context of corrosion prevention, "cathodic protection" is a technique used to protect metal structures, such as pipelines and ships, from rusting. By making the metal structure the cathode in an electrochemical cell, it prevents corrosion by redirecting the electrochemical reactions that would otherwise damage the metal.