ABSTRACT
To investigate impedance on carbon in order to clarify its behavior as anode in CP system, EIS test has been done on carbon after polarizing it in different potential values. In this experiment, after carbon fibers were polarized anodically from open circuit corrosion potential (OC potential) as 20, 40, 60, 100, 150, 300, 500, 750, 1000, 1500, 2000, 2500, 3500, 5000 mV,
1 INTRODUCTION
Reinforced concrete is widely used in construction. The corrosion of the steel reinforcing bars in the concrete limits the lifespan of concrete structures (Chang 2000). The direct cause of destruction is increase of volume of steel reinforcement as the result of corrosion product formation (Darowicki 2003). Therefore the registered need for rehabilitation and repair and the associated costs is a matter of great concern for those responsible for assessment and maintenance of affected structures.
