Corrosion and corrosion control of iron pipe: 75 years of research

摘要

The Ductile Iron Pipe Research Association, formerly the Cast Iron Pipe Research Association, has conducted research on iron pipe since 1928. This research has dealt primarily with corrosion and corrosion control of ductile- and gray-iron pipe. A statistical analysis of a large database derived from these test programs and in-service inspections concluded that (1) the 10-pointsoil evaluation system published in the Standard for Polyethylene Encasement for Ductile-Iron Pipe Systems (C105/A21.5; ANSI/AWWA, 1999) is an accurate and dependable method of evaluating soils fortheir corrosiveness of iron pipe; (2) polyethylene encasement is effective as a corrosion control system; and (3) damages to polyethylene encasement do not accelerate the corrosion rate beyond that of iron pipe that is not encased.