Synergistic inhibition effect of imidazoline derivative and l-cysteine on carbon steel corrosion in a CO2-saturated brine solution
By Zhang, Chen; Duan, Hanbing; Zhao, Jingmao
Published in Corrosion Science
NULL
2016
Abstract
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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