EFFECT OF INHIBITORS ON THE CORROSION BEHAVIOUR OF CARBON STEEL REINFORCED IN CONCRETE.
Keywords:
Corrosion, Inhibitor, Concrete, Carbon steel, Vernoniaamygdalina.Abstract
The effect of inhibitors on the corrosion behaviour of carbon steel reinforced in concretes exposed to 3.5% NaCl solution and tap water has been studied. Carbon steel was used as reinforcing bar for the experiment, calcium nitrite; sodium nitrite and bitter leaf (vernoniaamygdalina) extract were used as inhibitors. The corrosion behaviour was evaluated from potential and resistance readings using half-cell potential and concrete resistivitymeasurement techniques respectively. The results show that calcium nitrite and bitter leaf extract reduced corrosion rate in rebar compared to sodium nitrite. From the results, it is evident that the extract from vernoniaamygdalina (bitter leaf) acts as an excellent inhibitor for corrosion in reinforced concrete.References
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