Abstract
The importance in real structures of an accurate identification of the zones suffering corrosion, and the determination of the actual loss in cross-section in these zones and the rate of its progress is recognized. Although there exist several techniques used on-site for characterizing corrosion of reinforcements, the most appropriate are those of an electrochemical nature because this is the basis of the corrosion process. The three parameters most frequently used for the corrosion evaluation are: the corrosion potential Ecorr, the concrete resistivity ρ, and the corrosion rate Icorr calculated from the polarization resistance Rp. In a real structure, the measurement of the three corrosion parameters allows the identification of the zones with high risk for damage. The principles of the use of the corrosion rate and the corrosion potential measurements for the evaluation of corrosion in reinforcement structures are described and current and future applications outlined.
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