Phosphites compound: Novel corrosion inhibitor for radioactive waste container (carbon steel) in simulated Callovo-Oxfordian (COx) groundwater

M. A. Deyab, R. Ouarsal, M. Lachkar, B. El Bali, Rachid Essehli

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

NaNi(H2PO3)3·H2O (NaNiPh) has been evaluated as a new inorganic inhibitor for radioactive waste container (carbon steel) corrosion in the Callovo-Oxfordian (COx) groundwater using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The experimental findings were supported using scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) investigations. The value of the inhibition efficiency obtained from polarization curves is 96.7% at 100 ppm concentration, which is in good agreement with the data obtained from EIS (93.7%). Based on polarization data, NaNiPh can be classified as mixed inhibitor. The corrosion process is inhibited by physical adsorption of NaNiPh on carbon steel surface and the adsorption process follows Langmuir isotherm model. The activation parameters were calculated and corroborate the proposed inhibition mechanism.

Original languageEnglish
Pages (from-to)994-999
Number of pages6
JournalJournal of Molecular Liquids
Volume219
DOIs
Publication statusPublished - 1 Jul 2016

Fingerprint

Phosphites
Radioactive Waste
radioactive wastes
carbon steels
Corrosion inhibitors
ground water
Radioactive wastes
containers
Electrochemical impedance spectroscopy
inhibitors
Carbon steel
Containers
Groundwater
corrosion
Polarization
Adsorption
Steel corrosion
Potentiodynamic polarization
polarization
impedance

Keywords

  • Carbon steel
  • Corrosion inhibitor
  • Electrochemical
  • Groundwater

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry

Cite this

Phosphites compound : Novel corrosion inhibitor for radioactive waste container (carbon steel) in simulated Callovo-Oxfordian (COx) groundwater. / Deyab, M. A.; Ouarsal, R.; Lachkar, M.; El Bali, B.; Essehli, Rachid.

In: Journal of Molecular Liquids, Vol. 219, 01.07.2016, p. 994-999.

Research output: Contribution to journalArticle

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