What is the role of an anode in relation to buried steel pipes?

The role of an anode in relation to buried steel pipes is to prevent corrosion. When steel pipes are buried underground, they are susceptible to corrosion due to moisture and electrolytic activity in the soil. Anodes, typically made of materials that corrode more easily than steel, such as zinc or magnesium, are installed as part of a cathodic protection system. This system works by sacrificing the anode to protect the steel pipe; as the anode corrodes, it generates a protective electrical current that helps to inhibit the corrosion process on the steel. This method is crucial for prolonging the life of buried steel infrastructure, ensuring that it maintains its integrity and functionality over time.