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vol.61 issue3EFFECT OF CONCENTRATION AND MOLECULAR MASS OF PEO ON THE MICELLIZATION AND THERMODYNAMIC BEHAVIOUR OF CETYLTRIMETHYLAMMONIUM BROMIDE (CTAB) IN AQUEOUS PEO-CTAB MIXED SYSTEMTHERMODYNAMIC AND ADSORPTION ISOTHERM OF N,N'-BIS(2,4,6-TRIHYDROXYACETOPHENONE)-2,2-DIMETHYLPROPANDIIMINE AS A CORROSION INHIBITOR ON SA-210 STEEL IN ALKALINE NACL SOLUTION author indexsubject indexarticles search
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Journal of the Chilean Chemical Society

On-line version ISSN 0717-9707

Abstract

MOUSSAOUI, NAIMA; ZEROUALI, DJILALI  and  BETTAHAR, NOUREDDINE. INHIBITIVE EFFECT OF DATE EXTRACT ON THE CORROSION OF CARBON STEEL IN ACIDIC MEDIA. J. Chil. Chem. Soc. [online]. 2016, vol.61, n.3, pp.3018-3024. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072016000300002.

The inhibitive effect of date extract on the corrosion of Carbon steel in 1M HCl solution has been investigated by weight loss measurement, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The presence of this extract reduces remarkably the corrosion rate of mild steel in acidic solution. The inhibition efficiency was found to increase with increasing inhibitor concentrations due to the adsorption of the inhibitor molecules on the metal surface, this adsorption follows Langmuir's adsorption isotherm. The inhibition efficiency was found to be 85.84% at 1.5V/V% in 1M HCl. Temperature studies revealed a decrease in efficiency with rise in temperature.

Keywords : Carbon steel; Green corrosion inhibitors; Date extract; Electrochemical methods; Acid medium.

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