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Insight into the corrosion inhibition of Biebersteinia multifida root extract for carbon steel in acidic medium

Khayatkashani, M ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1016/j.scitotenv.2022.155527
  3. Publisher: Elsevier B.V , 2022
  4. Abstract:
  5. In this project, the protective effect of Biebersteinia multifida root extract (BMRE) against corrosion of 1018 low carbon steel (1018LCS) in HCl solutions was appraised by assessing weight loss, electrochemical impedance spectroscopy (EIS), and polarization at 25 °C. The maximum inhibitory efficacy for the concentration of 1 g/l of the BMRE was 92.8% at 25 °C after 2 h and increased to 95.3% after 24 h of immersion. Polarization experiments have shown that the extract in acidic solutions can act as a mixed corrosion inhibitor. The corrosion inhibitory efficacy of BMRE decreased with increasing temperature, and at all temperature settings studied, the adsorption of BMRE molecules on 1018 LCS was consistent with the Langmuir adsorption isotherm. The Scanning Electron Microscopy (SEM) analysis confirmed the protection of 1018 LCS in the acidic solution containing BMRE extract. Quantum chemistry studies of four main constituents of the extract called vasicinone, umbelliferon, scopoletin, and ferulic acid were performed by density functional theory, DFT, in neutral and protonated states. Calculated quantum parameters were used to investigate the active sites and donor-receptor interactions of molecules. © 2022 Elsevier B.V
  6. Keywords:
  7. 1018 Low carbon steel ; Corrosion inhibitors ; Electrochemical impedance spectroscopy ; Hydrochloric acid ; Polarization ; Root extract ; Chlorine compounds ; Corrosion protection ; Density functional theory ; Electrochemical corrosion ; Low carbon steel ; Molecules ; Quantum chemistry ; Quantum theory ; Scanning electron microscopy ; Steel corrosion ; Acidic media ; Acidic solutions ; Biebersteinia multifida ; Corrosion inhibition ; Electrochemical-impedance spectroscopies ; HCl solution ; Low-carbon steels ; Protective effects ; Root extracts ; Biebersteinia multifida root ; Ferulic acid ; Scopoletin ; Umbelliferone ; Unclassified drug ; Acid ; Electrochemical method ; Herb ; Inhibitor ; Root ; Acidity ; Adsorption ; Concentration (parameter) ; Geraniaceae ; Impedance spectroscopy ; Plant root ; Polarization ; Temperature ; Angiosperm ; Chemistry ; Acids ; Carbon ; Corrosion ; Magnoliopsida ; Plant Extracts ; Steel ; Plant extract
  8. Source: Science of the Total Environment ; Volume 836 , 2022 ; 00489697 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0048969722026237