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Theoretical and Experimental Studies for Corrosion Inhibition Performance of Q235 Steel by Imidazoline Inhibitors against CO2 Corrosion

  • Original Article
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Journal of Surfactants and Detergents

Abstract

The inhibition performance of two imidazoline inhibitors, 1-(2-thioureaethyl)-2-alkyl-imidazoline (TAI) and chloride-1-(2,3-dihydroxylpropyl)-1-(2-thioureaethyl)-2-alkyl-imidazoline sodium phosphate (TAIP), for Q235 steel in saltwater saturated with CO2 was studied by using molecular dynamics simulations and quantum chemistry calculations. The conclusions were experimentally verified by weight loss, polarization curves, electrochemical impedance spectroscopy (EIS) and surface analysis techniques. The theoretical results suggest that imidazoline ring and heteroatoms are the active site and the adsorption stability weakens gradually in the order of TAIP, TAI. Experimental results show that the two inhibitors act as mixed type inhibitors and can inhibit the corrosion of Q235 in CO2 saturated saltwater solution.

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Acknowledgments

The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (Project No. 40806030).

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Authors and Affiliations

  1. Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, 238 Songling Road, Qingdao, 266100, Shandong, People’s Republic of China

    Jing Zhang, Longwei Niu, Fengmin Zhu, Chengjie Li & Min Du

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  1. Jing Zhang
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  2. Longwei Niu
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  3. Fengmin Zhu
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  4. Chengjie Li
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  5. Min Du
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Correspondence to Jing Zhang.

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Zhang, J., Niu, L., Zhu, F. et al. Theoretical and Experimental Studies for Corrosion Inhibition Performance of Q235 Steel by Imidazoline Inhibitors against CO2 Corrosion. J Surfact Deterg 16, 947–956 (2013). https://doi.org/10.1007/s11743-013-1515-8

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  • DOI: https://doi.org/10.1007/s11743-013-1515-8

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