How does the Cathodic Protection System work?
ETI consulted with multiple experts, including a university professor who has a PhD in metallurgy and is a Professional Engineer, to determine the best method of precluding corrosion in harsh environments. A comprehensive study resulted in the creation of the Cathodic Protection System (CPS). Copper buried in the earth naturally resists corrosion because it generates a self-protective negative voltage potential relative to the surrounding soil. In those rare areas where corrosive conditions may reduce or eliminate this self-protective voltage, corrosion can be prevented with a small amount of “impressed electrical current” applied to the copper through a buried inert metal or graphite anode. The CPS control system uses the Impressed Current method. It supplies a specific number of milliamps per square foot of copper that is in contact with the earth. It constantly delivers direct current to the earth loops, manifolds, and line sets. The amount of current is pre-set at the factory to ma
