What is the positive side of the cathodic protection system typically referred to?

In a cathodic protection system, the positive side is referred to as the cathode. This is the component that receives the electrons in the electrochemical reaction designed to prevent corrosion. When corrosion occurs, it is often because electrochemical processes are taking place that lead to the deterioration of metal surfaces. Cathodic protection works by making the metal structure (such as pipes or tanks) the cathode.

By applying a negative charge from an external power source or through sacrificial anodes, this setup increases the potential of the structure that is being protected. The protection comes from ensuring that the metal does not oxidize, effectively reducing the risk of corrosion. It is crucial for operators to understand this fundamental aspect of electrochemistry when maintaining and designing systems intended to prevent corrosion, as it helps in ensuring that the protective measures are effective and properly implemented.