Abstract
Recently, early deterioration of concrete structure has caused many serious troubles. Chloride induced corrosion of reinforcing steel, that is an electrochemical reaction, is a typical cause of such deterioration. Although polarization resistance method is considered effective for monitoring corrosion in reinforcing steel, it is still difficult to determine the exact amount of corrosion loss.
In this study, characteristics of the double rectangular pulse method and the AC impedance method are investigated, and quantitative estimates of corrosion loss of reinforcing steel are accomplished, even in the case where macro-cell corrosion occurs, in which corrosion progresses at different speeds in a same steel bar.
