Protecting Carbon Steel and Ductile Iron Sewer Pipe Using High-Performance Ceramic Epoxy Coatings—Next generation technologies meeting demanding service requirements

Aging and deteriorating wastewater pipeline infrastructure has become a major problem in the United States. Hydrogen sulfide (H2S) is a major cause of internal corrosion in the crown areas of metallic gravity sewer pipelines and low velocity force mains. The deposition of solids further contributes to corrosion and blockages in gravity sewers leading to scouring and abrasion damage of the pipe inverts in force mains. Several types of protective coatings have been historically offered in the U.S. for the interior corrosion protection of carbon steel and ductile iron sewer pipe. Next generation liquid ceramic epoxies offer low-permeation resistance to elevated hydrogen sulfide and other sewer gases, exhibit enhanced abrasion resistance, and can withstand the destructive forces of today’s high-velocity jet cleaning equipment. Wastewater utilities can benefit from innovative ceramic epoxy coatings to protect metallic sewer pipes and extending the service life of wastewater pipeline infrastructure.