The results presented in this paper concern the effectiveness of organic commercial migrating inhibitors on steel reinforcements corrosion. Four series of concrete specimens were cast to verify inhibitor ability to delay, reduce or stop corrosion, both on chlorides contaminated concrete (adding chlorides in the mixture, or penetrating the concrete) and in carbonated concrete. Two organic migrating inhibitors (amine and alkanolamines based) were applied on the surface of concrete following the manufacturers’ recommendations. Free corrosion potential and corrosion rate of steel rebar were periodically monitored for five years. Results show that migrating inhibitors are not effective in reducing corrosion rate, both in chlorides and carbonation induced corrosion, while a certain effect was observed on the delay of corrosion initiation in the case of chlorides penetration.

Subject
Corrosion rate, Rebar, Corrosion initiation, Free corrosion potential, Penetration, Corrosion inhibitors, Carbonation, Cement, Corrosion resistance, Risk reduction, Chlorides, Polarization resistance, Concrete
Keywords:
concrete, migrating inhibitors, chloride induced corrosion, carbonation
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2007
Association for Materials Protection and Performance (AMPP)
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