Corrosion Inhibition of Imidazoline Derivates with Benzene Rings on Mild Steel in CO2-Saturated Brine Solution |
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Authors: | CHEN Guo-hao ZHAO Jing-mao |
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Institution: | College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China |
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Abstract: | Corrosion inhibition of three imidazoline derivates with different numbers of benzene rings, namely 2-phenyl-1-ethylamino imidazoline(CI-1), 2-phenyl-1-ethylamino-1-methylbenzyl quaternary imidazoline(CI-12) and 2-phenyl-1-benzoyl ethylamino imidazoline(CI-13), on mild steel in CO2-saturated brine solution was evaluated by mass-loss method and potentiodynamic polarization method. The results show that the three imidazoline derivates can inhibit CO2 corrosion effectively with CI-12 ranking the highest. They mainly restrain the anodic dissolution and act as anodic-type inhibitors. The adsorptions of these derivates on the mild steel surface follow the Langmuir adsorption isothermal equation and belong to chemical adsorption. |
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Keywords: | Corrosion inhibitor CO2 corrosion Langmuir adsorption Imidazoline derivate |
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