Galvanic Cathodic Protection of Reinforced Concrete Bridge Members UsingSacrificial Anodes Attached by Conductive Adhesives

摘要

This is the interim report in a study to investigate the feasibility of usinggalvanic cathodic protection (CP) of reinforced concrete bridge members using sacrificial anodes attached by conductive adhesives. Galvanic CP systems have recognized advantages of simplicity and the potential to operate with little or no mainteneance for the life of the system. But galvanic systems have been used relatively little. Applications have so far been limited to the seawater splash and tidal zone where concrete is moist and most conductive, and where the anode surface is periodically wetted. In this study, a new galvanic CP system is being investigated in which sacrificial anodes are attached to the concrete surface with ionically conductive adhesives called hydrogels.