Abstract
The effectiveness of hydrazine hydrate as a corrosion inhibitor for reinforcing steel in alkaline media (lime water) has been investigated. It has been found that the critical concentration for inhibition increases with the increase of the aggressive ion concentration. The mechanism of the corrosion inhibition was discussed in terms of competitive adsorption between the aggressive ion and hydrazine at relatively low concentrations of hydrazine. Higher concentrations of hydrazine caused instantaneous passivation of the steel even more readily than that obtained in pure lime water.
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