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Proficient Schiff’s Bases as Facile Structures to Limit Corrosion of Mild Steel: Synthesis and Electrochemical Studies Aided by Computational Quantum Parameters

Proficient Schiff’s Bases as Facile Structures to Limit Corrosion of Mild Steel: Synthesis and... The inhibition capabilities of two afresh synthesized Schiff bases (SBs), i.e. 2,2'-((((1,4-phenylene bis(azanediyl))bis(4,1-phenylene))bis(azanylylidene))bis(methanylylidene)) diphenol (SB-I) and 3,3'-((((1,4-phenylenebis(azanediyl))bis(4,1-phenylene))bis(azanylylidene))bis(methanylylidene))diphenol (SB-II) were used as corrosion inhibitors for mild steel(MS) in 0.5 M H2SO4 medium. Corrosion controlling the tendency of SB-I and SB-II was calculated by weight loss, electrochemical impedance spectroscopy (EIS) and Tafel polarization methods. The highest inhibition efficiencies observed were 97.04% (SB-I) and 95.21% (SB-II) with higher inhibitors concentration (200 mg L−1) at 298 K temperature. The studied SBs depict that the inhibition efficiency was increased with increasing the inhibitor concentrations but showed a fall with rising temperatures. Tafel polarization indicates that the SBs acted as mixed-type candidates. EIS confirms that the value of charge transfer resistance (Rct) increases at higher concentrations of each SB which proposed that adsorption by inhibitors on a mild steel surface. The Langmuir adsorption isotherm follows adsorption. The anticorrosive layer formed by the inhibitors molecule due to the adsorption on the mild steel surface is supported by Scanning electron microscopy (SEM), Atomic force microscopy (AFM) and attenuated total reflectance (ATR) studies. Computational data were analyzed using density functional theory (DFT) with Fukui functions and molecular dynamics (MD) that are in good relationship with the experimental outcomes. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Bio- and Tribo-Corrosion Springer Journals

Proficient Schiff’s Bases as Facile Structures to Limit Corrosion of Mild Steel: Synthesis and Electrochemical Studies Aided by Computational Quantum Parameters

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References (66)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
ISSN
2198-4220
eISSN
2198-4239
DOI
10.1007/s40735-023-00764-7
Publisher site
See Article on Publisher Site

Abstract

The inhibition capabilities of two afresh synthesized Schiff bases (SBs), i.e. 2,2'-((((1,4-phenylene bis(azanediyl))bis(4,1-phenylene))bis(azanylylidene))bis(methanylylidene)) diphenol (SB-I) and 3,3'-((((1,4-phenylenebis(azanediyl))bis(4,1-phenylene))bis(azanylylidene))bis(methanylylidene))diphenol (SB-II) were used as corrosion inhibitors for mild steel(MS) in 0.5 M H2SO4 medium. Corrosion controlling the tendency of SB-I and SB-II was calculated by weight loss, electrochemical impedance spectroscopy (EIS) and Tafel polarization methods. The highest inhibition efficiencies observed were 97.04% (SB-I) and 95.21% (SB-II) with higher inhibitors concentration (200 mg L−1) at 298 K temperature. The studied SBs depict that the inhibition efficiency was increased with increasing the inhibitor concentrations but showed a fall with rising temperatures. Tafel polarization indicates that the SBs acted as mixed-type candidates. EIS confirms that the value of charge transfer resistance (Rct) increases at higher concentrations of each SB which proposed that adsorption by inhibitors on a mild steel surface. The Langmuir adsorption isotherm follows adsorption. The anticorrosive layer formed by the inhibitors molecule due to the adsorption on the mild steel surface is supported by Scanning electron microscopy (SEM), Atomic force microscopy (AFM) and attenuated total reflectance (ATR) studies. Computational data were analyzed using density functional theory (DFT) with Fukui functions and molecular dynamics (MD) that are in good relationship with the experimental outcomes.

Journal

Journal of Bio- and Tribo-CorrosionSpringer Journals

Published: Sep 1, 2023

Keywords: Mild steel; Schiff bases; Anticorrosive electrochemical studies; Semi-empirical calculations; Acidic medium

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