Protecting an existing ductile iron water main using linear anodes

Protecting an existing ductile iron water main using linear anodes - ene. 2008 - 5 p. ; 38-42

A Wisconsin water utility has implemented a demonstration project using horizontal diretional drilling equipment to install a continuous linear anode directly alongside an existing water main that has experienced significant external pitting corrosion. The results of the initial demonstration project suggest that a 40-year life extension of the water main may be achievable at a cos that is significantly less than the replacement costo of the pipe.

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