ELECTROCHEMICAL STUDIES OF STEARAMIDE DERIVATIVEAS INHIBITOR FOR THE CARBON DIOXIDE CORROSION OFMILD STEEL

摘要

The inhibiting action of a kind of acylamino compound (stearamide derivative inhibitor) on the carbonrndioxide corrosion of mild steel in CO2 saturated brine media was studied using linear polarization andrnelectrochemical impedance spectroscopy (EIS) methods. Experimental results revealed that stearamidernderivative inhibitor act as a good inhibitor for mild steel in aerated brine solution. The corrosionrnresistance was greatly enhanced in the presence of tested inhibitor and the inhibition efficiency increasedrnwith increasing concentrations to attain 91.26% at 0.5gL -1. Equivalent circuit of the investigated systemrnwas suggested.