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CFRP Reinforcement Anode For Cathodic Protection Of Steel Rebar

CFRP Reinforcement Anode For Cathodic Protection Of Steel Rebar
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Only a few researchers have studied the effect of carbon fiber repair on corrosion processes. The main protective effect is the "protective barrier" which is sometimes called passive protection against corrosion, comparable to some techniques such as anticorrosion coatings of concrete structures. Indeed, CFRP materials, applied as external reinforcing material on reinforced concrete structures form a protective barrier against the penetration of moisture and pollutants such as chlorides or carbon dioxide.1.2.3.4.5 Apart from this impermeable barrier action, it has been found in these studies that the confinement of CFRP concrete has a positive influence on the onset of corrosion and on its velocity. Very little research has investigated the coupling between mechanical reinforcement and impressed current system.6,7,8 

Product Number: 51322-17877-SG
Author: Xavier Hallopeau, Olivier Lesieutre, Camille Annede-Villeau
Publication Date: 2022
Industries: Coatings and Linings , Corrosion Monitoring and Control , Coatings
$0.00
$20.00
$20.00

This paper reports the development of an impressed current anode for the cathodic protection of steel reinforced rebar in concrete. The application of a DC current on a carbon fiber reinforced polymer, used both as a structural reinforcement and as an anode surface, allows to polarize the steel in concrete. It is then possible to combine the strengthening function with the development of a multifunctional composite allowing protecting of steel rebar from corrosion and also allowing the monitoring of repairing function versus time. In this technique, the steel/electrolyte interface is electrically polarized using external impressed current. Application on beams and columns of matrix is reported on an iconic building, the Belfry of Le Touquet’s town in the north of France. A comparison with the use of Ti/MMO discrete anodes is presented in the case of a pilot test. 

This paper reports the development of an impressed current anode for the cathodic protection of steel reinforced rebar in concrete. The application of a DC current on a carbon fiber reinforced polymer, used both as a structural reinforcement and as an anode surface, allows to polarize the steel in concrete. It is then possible to combine the strengthening function with the development of a multifunctional composite allowing protecting of steel rebar from corrosion and also allowing the monitoring of repairing function versus time. In this technique, the steel/electrolyte interface is electrically polarized using external impressed current. Application on beams and columns of matrix is reported on an iconic building, the Belfry of Le Touquet’s town in the north of France. A comparison with the use of Ti/MMO discrete anodes is presented in the case of a pilot test. 

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