ELECTROCHEMICAL-BEHAVIOR OF SULFITE AND HYDRAZINE ON THE CORROSION OFLOW-CARBON STEEL IN ACID-MEDIUM

The open-circuit potential measurements of low carbon steel (0.05% C) as well as weight-loss measurements at different pH values ranging fro m 1 to 4 in solutions of different concentrations of two inhibitors so dium sulphite and hydrazine have been investigated in presence of chlo roacetic acid solutions. The steady state potential shifted to more po sitive values by increasing pH from 1-2, while the corrosion potential increased to a more negative values at pH 3-4. The corrosion rate inc reases with decrease in concentration of sulphite and hydrazine.