Experimental evaluation of new inorganic phosphites as corrosion inhibitors for carbon steel in saline water from oil source wells

M. A. Deyab, Khadija Eddahaoui, Rachid Essehli, Tarik Rhadfi, Said Benmokhtar, Giuseppe Mele

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35 Citations (Scopus)

Abstract

Corrosion inhibition potentials of three phosphites namely, M(HPO3) (where M=Mn, Co and Cu), for carbon steel in saline water from oil source wells were evaluated using weight loss and electrochemical impedance spectroscopy (EIS) methods. Characterization of the surface morphology was performed by SEM/EDX investigations. The corrosion rate of carbon steel in saline water decreased with increasing M(HPO3) concentration and increased with increasing temperature. M(HPO3) inhibits the corrosion of carbon steel by an adsorption mechanism, which follows Langmuir isotherm adsorption. The order of the inhibition efficiency of inhibitors is as follows: Mn(HPO3)3)3). The thermodynamic functions of dissolution and adsorption processes were calculated and discussed.

Original languageEnglish
Pages (from-to)38-45
Number of pages8
JournalDesalination
Volume383
DOIs
Publication statusPublished - 1 Apr 2016

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Keywords

  • Carbon steel
  • Corrosion inhibitors
  • Phosphite
  • Saline water

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Chemistry(all)
  • Materials Science(all)
  • Water Science and Technology

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