A patch repair is applied to the concrete structure deteriorated by the
chloride ions. However, the macrocell corrosion maybe formed after a repair, when
there are a lot of chloride ions in the existing concrete. This steel corrosion rate
might be changed. Therefore, it is effective to monitor at any time-interval.
Based on the above backgrounds in this study, the analyzing method for the
corrosion current to monitor the repair effect after the patch repair is developed. The
experiments are investigated in three steps. Firstly, the sensing method is developed.
Secondly, the corrosion currents between measured from cathode to anode using
the specimen with the special divided steel bar, and analyzed by this developed
method, are compared. Thirdly, the analyzed values and the actual corrosion or nocorrosion
areas are compared. As results, (1) the analyzed values are equal to the
measured values; (2) the analyzed corrosion area is equal to the actual corrosion
area. It can be judged that the quantitative monitoring method for the repair effect
after the patch repair is developed