Benabdellah, M. and Dafali, A. and Hammouti, B. and Aouniti, A. and Rhomari, M. and Raada, A. and Senhaji, O. and Robin, J.J. (2007) The role of phosphonate derivatives on the corrosion inhibition of steel in HCI media. Chemical Engineering Communications, 194 (10). pp. 1328-1341.

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Abstract

The inhibition of corrosion of steel by two P-containing compounds, sodium methyldodecyl phosphonate and sodium methyl (11-smethacryloyloxyundecyl) phosphonate, in hydrochloric acid has been investigated at various temperatures using electrochemical techniques (impedance spectroscopy (EIS), potentiodynamic polarization) and weight loss measurements. Inhibition efficiency (E) increased with phosphonate concentration. Adsorption of inhibitors on the steel surface in 1 M HCl follows the Langmuir isotherm model. EIS measurements showed that the dissolution process of steel occurred under activation control. Polarization curves indicated that inhibitors tested acted as cathodic inhibitors. The temperature effect on the corrosion behavior of steel in 1 M HCl without and with the inhibitor was studied in the temperature range from 313 to 353 K. The adsorption free energy and activation parameters for the steel dissolution reaction in the presence of phosphonates were determined.

Item Type: Article
Uncontrolled Keywords: Adsorption isotherms; Corrosion inhibitors; Derivatives; Dissolution; Electrochemical impedance spectroscopy; Phosphorus compounds; Potentiodynamic polarization; Thermal effects, Inhibition efficiency; Langmuir isotherm; Phosphonate, Steel corrosion, Adsorption isotherms; Corrosion inhibitors; Derivatives; Dissolution; Electrochemical impedance spectroscopy; Phosphorus compounds; Potentiodynamic polarization; Steel corrosion; Thermal effects
Subjects: Chemical Engineering
Divisions: SCIENTIFIC PRODUCTION > Chemical Engineering
Depositing User: Administrateur Eprints Administrateur Eprints
Last Modified: 31 Jan 2020 15:45
URI: http://eprints.umi.ac.ma/id/eprint/1763

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