Underground pipeline corrosion

It has been estimated that losses to the water works industry in the United States due to underground corrosion are in excess of $150,000,000 annually. Work definitions and theory of underground pipeline corrosion are presented. Various methods have been tried in an attempt to combat the effects of corrosion on ferrous metal pipe buried in the ground. Insulating coating supplemented by a cathodic protection has proven to be the most economical and longest term positive corrosion control method yet developed.