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Synergistic Effect of Benincasa hispida Peel Extract and KI on the Corrosion Inhibition of Mild Steel in HCl

Author

Listed:
  • Qihui Wang

    (School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China)

  • Chongkang Zhao

    (School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China)

  • Qi Zhang

    (School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China)

  • Xing Zhou

    (School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China)

  • Zhitao Yan

    (School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China)

  • Yi Sun

    (School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China)

  • Da Sun

    (Institute of Life Science & Biomedical Collaborative Innovation Center of Zhejiang Province, Zhejiang Provincial Key Laboratory for Water Environment and Marine Biological Resources Protection, National & Local Joint Engineering Research, Center for Ecological Treatment Technology of Urban Water Pollution, Wenzhou University, Wenzhou 325035, China)

  • Xueming Li

    (School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China)

Abstract

This study employed Benincasa hispida peel as a raw material for the preparation of Benincasa hispida peel extract (BHPE) via hot water extraction and freeze-drying processes. The synergistic effect of BHPE and KI on the corrosion inhibition of mild steel in 1 M HCl was investigated. The compositional analysis shows that BHPE consists mainly of a mixture of sugars, characterized by a high density of hydroxyl groups and unsaturated functional groups, characteristic of highly effective corrosion inhibitors. Electrochemical experiments and surface analysis show that the composite of BHPE and KI can effectively provide protection to mild steel. Moreover, the synergistic coefficient of BHPE and KI under various concentration conditions was greater than 1, and the highest corrosion inhibition efficiency was 94.4%. In addition, the corrosion inhibition mechanism of BHPE was thoroughly investigated using quantum chemistry (QC) and molecular dynamics simulation (MDS).

Suggested Citation

  • Qihui Wang & Chongkang Zhao & Qi Zhang & Xing Zhou & Zhitao Yan & Yi Sun & Da Sun & Xueming Li, 2023. "Synergistic Effect of Benincasa hispida Peel Extract and KI on the Corrosion Inhibition of Mild Steel in HCl," Sustainability, MDPI, vol. 15(14), pages 1-19, July.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:14:p:11370-:d:1199572
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