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Synergistic Effect of Potassium Iodide with L-Tryptophane on the Corrosion Inhibition of Mild Steel: A Combined Electrochemical and Theoretical Study

International Journal of Electrochemical Science, ISSN: 1452-3981, Vol: 12, Issue: 1, Page: 166-177
2017
  • 48
    Citations
  • 0
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  • 33
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    48
    • Citation Indexes
      48
  • Captures
    33

Article Description

The inhibition effects of L-tryptophane (Trp) and its synergistic effect with KI on the corrosion of mild steel in 1.0 M HCl solution have been investigated by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) measurements. The results show that the inhibition efficiency increases with the concentration of Trp and increases further when KI exists. The synergistic effect between Trp and KI was discussed by calculating the synergism parameter, which suggests that there is a cooperative mechanism between iodide anion and Trp cation. Finally, Monte Carlo simulation was utilized to search for the equilibrium configurations of inhibitors/Fe(110) adsorption systems in the presence of water molecules.

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