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Experimental and Theoretical Studies of the Corrosion Inhibition Performance of a Quaternary Phosphonium-Based Ionic Liquid for Mild Steel in HCl Medium

Author

Listed:
  • Lei Guo

    (School of Materials and Chemical Engineering, Tongren University, Tongren 554300, China
    School of Oil and Natural Gas Engineering, Southwest Petroleum University, Chengdu 610500, China
    These authors contributed equally to this work.)

  • Yue Huang

    (College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China
    These authors contributed equally to this work.)

  • Yundong Wu

    (School of Materials and Chemical Engineering, Tongren University, Tongren 554300, China)

  • Wei Shi

    (College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China)

  • Faheem Abbas

    (Department of Chemistry, Tsinghua University, Beijing 100084, China)

  • Yuanhua Lin

    (School of Oil and Natural Gas Engineering, Southwest Petroleum University, Chengdu 610500, China)

  • Riadh Marzouki

    (Chemistry Department, College of Science, King Khalid University, Abha 61413, Saudi Arabia
    Chemistry Department, Faculty of Sciences, University of Sfax, 1171, Sfax 3000, Tunisia)

  • Xingwen Zheng

    (School of Chemical and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643099, China)

Abstract

The corrosion inhibition performance of a quaternary phosphonium-based ionic liquid, i.e., hexadecyltriphenylphosphonium bromide (HPP), on mild steel in 1 M HCl solution was investigated by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) methods. The surface characterization of mild steel was examined by scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDS). The results revealed that the inhibition efficiency increases with its increasing concentration, and it can reach up to 99.1% at the concentration of 0.07 mM HPP. PDP data showed that the absorption of HPP conformed to Langmuir adsorption, which served as a mixed-type inhibitor, involving chemisorption and physisorption. SEM analysis confirmed the formation of barrier film on the metal surface, inhibiting the acid attack. Moreover, density functional theory (DFT) calculations and molecular dynamics (MD) simulations were conducted to elucidate the adsorption mechanism of inhibitor molecules on the mild steel surface. A match between the experimental and theoretical findings was evidenced.

Suggested Citation

  • Lei Guo & Yue Huang & Yundong Wu & Wei Shi & Faheem Abbas & Yuanhua Lin & Riadh Marzouki & Xingwen Zheng, 2023. "Experimental and Theoretical Studies of the Corrosion Inhibition Performance of a Quaternary Phosphonium-Based Ionic Liquid for Mild Steel in HCl Medium," Sustainability, MDPI, vol. 15(4), pages 1-13, February.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:4:p:3103-:d:1062033
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    References listed on IDEAS

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    1. Xiaogang Li & Dawei Zhang & Zhiyong Liu & Zhong Li & Cuiwei Du & Chaofang Dong, 2015. "Materials science: Share corrosion data," Nature, Nature, vol. 527(7579), pages 441-442, November.
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