Efficacious Alkaline Copper Corrosion Inhibition by a Mixed Ligand Copper(II) Complex of 2,2′-Bipyridine and Glycine: Electrochemical and Theoretical Studies

Mohamed Ibrahim; Dalia Saleh; Morad El-Hendawy; Ahmed Fallatah; Gaber Mersal; Rabah Boukherroub; Joanna Wysocka; Jacek Ryl; Mohammed Amin

doi:10.1002/celc.202100218

Efficacious Alkaline Copper Corrosion Inhibition by a Mixed Ligand Copper(II) Complex of 2,2′-Bipyridine and Glycine: Electrochemical and Theoretical Studies

Abstract

A mixed ligand copper(II) complex, namely, [Cu(BPy)(Gly)Cl]⋅2H2O (CuC) (BPy=2,2′-bipyridine and Gly=glycine), was synthesized and characterized. The synthesized CuC complex was tested as inhibitor to effectively mitigate the corrosion of copper in alkaline solutions using the linear sweep voltammetry (LSV) and linear polarization resistance (LPR) techniques. For the sake of comparison, such two D.C. electrochemical techniques were also applied to the Cu/OH− interface in the presence of the two studied free ligands, namely, BPy and Gly. The results showed that the three studied compounds acted as mixed-type inhibitors, with CuC being the most efficacious one. The adsorption of the inhibitor is confirmed from X-ray photoelectron spectroscopy (XPS) profiles by the appearance of organic chlorine as well as pyridine and amine nitrogen bonds. Based on XPS data, it was presumed that the corrosion inhibitor stimulates the formation of Cu2CO3(OH)2 species at the electrode surface since, in the case of a corroded reference sample (in absence of inhibitors), its proportion is trivial. The reactivity of the isolated inhibitors was analyzed by computing several quantum chemical parameters based on the density functional theory (DFT). A good correlation was found between these parameters and the anticorrosive performance. Additionally, Monte Carlo simulation studies were applied to find the best configurational space of ligands and their complex on the Cu(111) surface.

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Authors (9)

Mohamed Ibrahim
- Taif University
Dalia Saleh
- Taif University
Morad El-Hendawy
- New Valley University
Ahmed Fallatah
- Taif University
Gaber Mersal
- Taif University
Rabah Boukherroub
- Lille University
Joanna Wysocka dr inż.
Jacek Ryl dr hab. inż.
Mohammed Amin Prof.
- Taif University

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Category:: Articles
Type:: artykuły w czasopismach
Published in:: ChemElectroChem no. 8, pages 2052 - 2064,
ISSN: 2196-0216
Language:: English
Publication year:: 2021
Bibliographic description:: Ibrahim M., Saleh D., El-Hendawy M., Fallatah A., Mersal G., Boukherroub R., Wysocka J., Ryl J., Amin M.: Efficacious Alkaline Copper Corrosion Inhibition by a Mixed Ligand Copper(II) Complex of 2,2′-Bipyridine and Glycine: Electrochemical and Theoretical Studies// ChemElectroChem -Vol. 8,iss. 11 (2021), s.2052-2064
DOI:: Digital Object Identifier (open in new tab) 10.1002/celc.202100218
Verified by:: Gdańsk University of Technology