METHOD FOR EVALUATING CORROSION RATE OF REINFORCING BAR

摘要

PROBLEM TO BE SOLVED: To solve the problem that polarization resistance acquired by the linear polarization resistance method has often contained environmental resistance in its resistance value. SOLUTION: A potential sweep is performed at a potential of approximately±10 mV with respect to the natural potential of a reinforcing bar at a speed, which indicates an environmental resistance (at which the potential is swept very fast), and a potential sweep is performed at a speed, which indicates the sum of the polarization resistance and the environmental resistance (at which the potential is swept very slowly). On the basis of the difference between the acquired sum of the polarization resistance and the environmental resistance and the acquired environmental resistance, the polarization resistance is determined to compute a corrosion current density. COPYRIGHT: (C)2004,JPO&NCIPI