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vol.61 issue3INHIBITIVE EFFECT OF DATE EXTRACT ON THE CORROSION OF CARBON STEEL IN ACIDIC MEDIALAÇASSE CATALYZED-SYNTHESIS OF 4,4'-BIPHENYLDIAMINE FROM P-CHLOROANILINE. EVALUATION OF ANTIFUNGAL AND ANTIOXIDANT ACTIVITIES author indexsubject indexarticles search
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Journal of the Chilean Chemical Society

On-line version ISSN 0717-9707

Abstract

DAHDELE, J; DANAEE, I  and  RASHED, G.R. THERMODYNAMIC 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. J. Chil. Chem. Soc. [online]. 2016, vol.61, n.3, pp.3025-3030. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072016000300003.

Adsorption isotherm of N,N'-bis(2,4,6-trihydroxyacetophenone)-2,2-dimethylpropandiimine (THAPDP) as an environmentally friendly Salen Ligand corrosion inhibitor on mild steel was studied in alkaline solution (pH=10) containing 3% NaCl. Measurements were carried out using electrochemical and surface techniques. Potentiodynamic polarization curves suggested that this compound was an effective corrosion inhibitor for mild steel and the protection efficiency was increased with the increase in inhibitor concentration. The experimental results indicated that this organic compound was a mixed-type inhibitor. Adsorption on the mild steel surface followed the Langmuir isotherm model. Activation parameters and thermodynamic adsorption parameters of the corrosion process such as Ea, ΔH, ΔS, Kads, and AG . were calculated at different temperatures.

Keywords : Corrosion; Inhibitor; Adsorption isotherm; Langmuir; Salen ligand.

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