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96327 ZINC MESH ANODES CAST INTO CONCRETE PILE JACKETS

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Product Number: 51300-96327-SG
ISBN: 96327 1996 CP
Author: Richard J. Kessler, Rodney G. Powers, Ivan R. Lasa
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A sacrificial anode cathodic protection system has been designed to provide corrosion control to the splash area as well as the submerged portion of reinforced concrete bridge pilings in marine environments. The system consists of a two piece stay in place fiberglass form provided with a internally placed expanded zinc mesh anode and filled with a portland cementsand mortar to protect the splash area of the pile. The submerged portion of the pile is protected using a standard zinc bulk anode. The experimental system was installed by the Florida Department of Transportation on two corrosion deteriorated piles at the Broward River Bridge in Jacksonville, Florida. The system’s performance was evaluated using NACE established criteria of 100 mV polarization development and polarization decay tests. Results indicate that adequate cathodic protection has been provided to the pile. Current discharged by the mesh anode at various elevations was also measured to further characterize the system’s operational behavior. The system provides cathodic protection and restores concrete lost to corrosion deterioration. It has the advantage of not requiring an external power supply or complex wiring system, and the required maintenance and monitoring is minimal. Keywords: Bridge Substructure, Concrete Piling, Sacrificial Anodes, Galvanic, Pile Jacketing.
A sacrificial anode cathodic protection system has been designed to provide corrosion control to the splash area as well as the submerged portion of reinforced concrete bridge pilings in marine environments. The system consists of a two piece stay in place fiberglass form provided with a internally placed expanded zinc mesh anode and filled with a portland cementsand mortar to protect the splash area of the pile. The submerged portion of the pile is protected using a standard zinc bulk anode. The experimental system was installed by the Florida Department of Transportation on two corrosion deteriorated piles at the Broward River Bridge in Jacksonville, Florida. The system’s performance was evaluated using NACE established criteria of 100 mV polarization development and polarization decay tests. Results indicate that adequate cathodic protection has been provided to the pile. Current discharged by the mesh anode at various elevations was also measured to further characterize the system’s operational behavior. The system provides cathodic protection and restores concrete lost to corrosion deterioration. It has the advantage of not requiring an external power supply or complex wiring system, and the required maintenance and monitoring is minimal. Keywords: Bridge Substructure, Concrete Piling, Sacrificial Anodes, Galvanic, Pile Jacketing.
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