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An Electrochemical Impedance Spectroscopy Study of Inhibition Effect of SONKOR Composition on Hydrogen Sulfide Corrosion of Carbon Steel

  • A. B. SheinEmail author
  • A. V. Melnikova
  • V. I. Kichigin
CORROSION INHIBITORS
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Abstract

The protective properties of five corrosion inhibitors of SONKOR series on low-carbon steel St20 in a 1 M HCl with the addition of 0–0.6 g/L H2S have been studied by the electrochemical impedance spectroscopy method. The series of changes in the adsorbability of corrosion inhibitors on a steel electrode in 1 M HCl and 1 M HCl + 0.6 g/L H2S solutions have been established. Equivalent electrical circuits have been proposed for various media. It is shown that some elements of equivalent circuits are associated with the kinetics of inhibitors adsorption.

Keywords:

sulphide corrosion low-carbon steel corrosion inhibitor electrochemical impedance spectroscopy adsorption kinetics 

Notes

FUNDING

This work was supported by the Russian Foundation for Basic Research, grant no. 17-43-590419.

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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  • A. B. Shein
    • 1
    Email author
  • A. V. Melnikova
    • 1
  • V. I. Kichigin
    • 1
  1. 1.Perm State National Research UniversityPermRussia

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