Galvanic corrosion inhibition behavior of coupled copper—Steel alloys in cooling water system

The purpose of this paper is to evaluate the electrochemical galvanic behavior of corrosion inhibition of the copper alloy–mild steel couple which exposed to cooling water. Polyvinyl alcohol inhibition behavior has been evaluated under different operating conditions. Weight loss and polarization techniques have been used to evaluate the corrosion rate kinetics. The inhibition efficiency increases with increasing concentration of inhibitor. Maximum inhibitor efficiency was 86% at 7000 ppm inhibitor concentration and 1:1 anode to cathode ration. The experimental data fit Langmuir isotherm. Mathematical analyses were used to correlate the variables. Quantum chemical parameters were calculated using the PM3-SCF method.