CORROSION KINETIC-STUDIES OF MILD-STEEL IN METHANOL-HYDROCHLORIC ACID-SOLUTION

The dissolution kinetics of mild steel and hydrogen evolution reaction s in deaerated methanol-hydrochloric acid solutions at different conce ntrations of chloride and hydrogen ions have been investigated. The di ssolution rate is found to increase with an increase in chloride conte nt at constant acid concentration and the reaction order with respect to Cl- is 1.12. The hydrogen evolution reaction rate slightly decrease s as the concentration of Cl- increases. The kinetic parameters derive d from the electrochemical studies have been found to be very close to the values obtained by weight loss measurements. The reaction order f or hydrogen evolution reactions is found to be very low (0.33).