Electrochemical and DFT studies of a new synthesized Schiff base as corrosion inhibitor in 1 M HCl. (March 2017)

• Record Type: Journal Article
• Authors: Benabid, Sonia; Douadi, Tahar; Issaadi, Saïfi; Penverne, Christophe; Chafaa, Salah
• Is Part Of: Measurement. Volume 99(2017)
• Page Start: 53
• Page End: 63
• Publication Date: 2017-03
• Subjects: Schiff base -- Weight loss -- Corrosion -- DFT; Weights and measures -- Periodicals; Measurement -- Periodicals; Measurement; Weights and measures; Periodicals; 530.8
• DOI: 10.1016/j.measurement.2016.12.022
• Languages: English
• ISSNs: 0263-2241

Abstract

Graphical abstract: AFM images: (a) mild steel, (b) mild steel in 1 M HCl and (c) mild steel in 1 M HCl in the presence of 7.5 × 10 −5 M HNTTD. Highlights: EIS measurements and weight loss measurements are in good agreement. Adsorption of inhibitor on steel surface followed Langmuir's adsorption isotherm. Formation of protective film on the mild steel surface. Good correlation between theoretical and experimental data is obtained. Abstract: A new Schiff base namely 1, 13-bis-[(2-hydroxynaphtaldehyde) 4, 7, 10-trioxatridecane diimine] (HNTTD) was synthesized and its corrosion behavior in 1 M hydrochloric acid solution on mild steel (MS) X48 was studied by using weight loss, polarization curves, electrochemical impedance spectroscopy (EIS) and quantum chemical calculations. All measurements showed that, inhibition efficiency increases with increasing inhibitor concentration. Polarization curves indicate that the studied compound was acting as mixed type inhibitor. The adsorption of HNTTD on steel surface followed Langmuir's adsorption isotherm. The molecular structure effect on the corrosion inhibition efficiency was investigated by using DFT calculations. The structural and electronic parameters were calculated and discussed. The results of AFM studies further confirmed the inhibition action of HNTTD.