The Challenge

Prestressed Concrete Cylinder Pipe (PCCP) is a rigid pipe designed to take optimum advantage of the tensile strength of steel and of the compressive strength and corrosion inhibiting properties of concrete and is frequently used for water transmission.

While the cement mortar and additional coatings usually protect the prestressing wire from corrosion, in certain circumstances chlorides can diffuse into the mortar, reach the wire, and cause chloride-induced corrosion of the prestressing wire. Therefore the challenge is to design a robust cathodic protection (CP) system to mitigate the risk of corrosion damage to the wire in high chloride environments.

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