What is the main purpose of cathodic protection?

The main purpose of cathodic protection is to prevent corrosion, particularly in metal structures that are embedded in or exposed to corrosive environments, such as underground tanks and pipelines. Corrosion occurs when metals react with elements in their environment, leading to degradation. Cathodic protection works by using a sacrificial anode or impressed current systems to shift the electrochemical potential of the metal structure, effectively making it the cathode in an electrochemical cell. This process significantly reduces the rate of corrosion by redirecting corrosive electrochemical activity away from the primary structure.

While enhancing fuel flow, reducing leaks, and inerting the system are important operational considerations in the management of tanks and pipelines, they are not the primary focus of cathodic protection. Instead, cathodic protection is specifically designed to extend the lifespan of metal components by minimizing corrosion, thus ensuring the integrity and safety of the system.