Corrosion Inhibition performance of polyethylene glycol/ polytriethanolamine inhibitors on corrosion of carbon steel in acidic medium

Abstract

The inhibition effect of three nonionic inhibitors on carbon steel corrosion in 1M H 2 SO 4 was studied gravimetrically and electrochemically. Increasing the number of triethanolamine units in the inhibitor molecules increases their inhibition efficiencies. The inhibiting action of inhibitors was attributed to their adsorption on the carbon steel surface and the formation of dense protective layer which increased by increasing their concentration. Polarization measurements showed that inhibitors act as mixed-type inhibitor in 1 M H 2 SO 4 with a domain of anodic one, and their inhibition on carbon steel proceeded by physical adsorption. Increasing the surface activity of inhibitors increased their inhibition efficiency