Novel triazole derivatives as ecological corrosion inhibitors for mild steel in 1.0 M HCl: experimental & theoretical approach. Issue 7 (21st January 2021)

• Record Type: Journal Article
• Authors: Nahlé, A.; Salim, R.; El Hajjaji, F.; Aouad, M. R.; Messali, M.; Ech-chihbi, E.; Hammouti, B.; Taleb, M.
• Is Part Of: RSC advances. Volume 11:Issue 7(2021)
• Page Start: 4147
• Page End: 4162
• Publication Date: 2021-01-21
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d0ra09679b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The present paper illustrates the investigation of two novel ecological triazole derivative corrosion inhibitors, namely ethyl 2-(4-phenyl-1 H -1, 2, 3-triazol-1-yl) acetate [Tria-CO2 Et], and 2-(4-phenyl-1 H -1, 2, 3-triazol-1-yl) acetohydrazide [Tria-CONHNH2 ]. Abstract : The present paper illustrates the investigation of two novel ecological triazole derivative corrosion inhibitors, namely ethyl 2-(4-phenyl-1 H -1, 2, 3-triazol-1-yl) acetate [Tria-CO2 Et], and 2-(4-phenyl-1 H -1, 2, 3-triazol-1-yl) acetohydrazide [Tria-CONHNH2 ]. The studied inhibitors were investigated against the corrosion of mild steel in 1.0 M HCl solution using different electrochemical techniques. Potentiodynamic polarization experiments indicated that the [Tria-CO2 Et], and the [Tria-CONHNH2 ] acted as mixed type inhibitors. Electrochemical impedance spectroscopy measurements revealed that both inhibitors presented a high inhibition performance, achieving an inhibition efficiency of 95.3% for [Tria-CO2 Et] and 95.0% for [Tria-CONHNH2 ] at a concentration of 1.0 × 10 −3 M. Based on the Langmuir isotherm model and the activation parameters, these triazole derivatives were adsorbed onto a steel surface by physical and chemical bonds. Density functional theory based on B3LYp6-311G(d, p) was also carried out to correlate the inhibition efficiencies obtained experimentally with the theoretical descriptors of the studied molecular structures.