EFFECTS OF SELECTED ALDEHYDES ON CORROSION INHIBITION OF LOW CARBON STEEL IN HYDROCHLORIC ACID PICKLING SOLUTION
Njoku, R.E,1 Oloche, O.B2 and Obikwelu, D.O.N1
Effects of formaldehyde, acetaldehyde, and benzaldehyde on corrosion inhibition of low carbon steel in hydrochloric acid pickling solution were investigated by weight loss and hydrogen evolution methods using a beaker – funnel – burette arrangement. Corrosion and hydrogen evolution rates were computed for steel samples immersed in hydrochloric acid pickling solution with the addition of varying concentrations of aldehydes. It was established that the organic compounds progressively inhibited corrosion and hydrogen evolution of the steel coupons as their concentration in the pickling medium was increased. Acetaldehyde showed the highest inhibition efficiency. Corrosion inhibition by the organic compounds could be attributed to adsorption phenomenon.