Synergistic inhibition effect of imidazoline derivative and l-cysteine on carbon steel corrosion in a CO2-saturated brine solution
By Chen Zhang and Hanbing Duan and Jingmao Zhao
Published in Corrosion Science
NULL
2016
Abstract
The corrosion inhibition performance of imidazoline derivative (IM) and l-cysteine (CYS) on carbon steel in CO2-saturated brine solution was investigated by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), weight loss, contact angle and X-ray photoelectron spectroscopy (XPS) measurements. The results show that the inhibition performance of individual \IM\ is slight for \CO2\ induced corrosion, and can be strengthened greatly by combined use with Cys. The synergistic inhibition effect of \IM\ and \CYS\ is observed. An adsorption model involving the initial adsorption of \CYS\ on carbon steel surface followed by \IM\ was proposed to elucidate the synergistic mechanism.
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