Materiales de Construcción, Vol 39, No 215 (1989)

Influence of the conductivity and the Ionic strength of synthetic solutions which simulate the aquouse phase of concrete In the corrosion process


https://doi.org/10.3989/mc.1989.v39.i215.800

S. Goñi
ICCET/CSIC, Spain

A. Moragues
ICCET/CSIC, Spain

C. Andrade
ICCET/CSIC, Spain

Abstract


Polarization Resistance (Rp) has been the electrochemical technique employed to study quantitatively the influence of Cl- and OH- ions on the corrosion of steel reinforcing, in a synthetic aqueous medium of similar composition to those of the concrete pore solution. Ionic strength, resistivity and their variations in function of CI- and OH- concentration have been chosen as more interesting solution parameters, together with intensity and potential corrosion measurements. The results showed the clear antagonistic role played by CI- and OH- ions on the corrosion process, which decreased as ionic strength increased.

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