A high yield (74.63%) bidentate Schiff base ligand was synthesized from the condensation reaction of 4-aminophenol and 4-diethylamino-2-hydroxybenzaldehyde by the reflux method. Its transition metal complexes of Ni, Cu and Zn were prepared from the corresponding metal salts in methanol solution using the same procedure. The chemical structure of the synthesized Schiff base and its metal complexes was characterized by physicochemical, spectral analysis (FTIR and UV-Visible), and molar conductivity studies which revealed that the metal complexes were non electrolytic. Elemental analysis data for the Schiff base ligand and its metal complexes were used to confirm the general formula of the compound. The spectral data showed that coordination occurred through the azomethine nitrogen atom and the oxygen atom of the phenolic ring. The corrosion inhibition of Schiff base and its metal complexes was evaluated using potentiodynamic polarization (PDP), linear polarization resistance (LPR), and weight loss (WL) methods in acidic oil and gas well treatment fluid. The corrosive fluid was simulated using 1 M HCl solution. The results indicated that the compounds had a promising inhibitory effect on the corrosion of ASTM-A36 low carbon steel in the medium. The effectiveness of the inhibitors decreased with increasing time and temperature, but improved with increasing concentration of the inhibitors. The metal complexes showed a synergistic effect against Schiff base, with NiL1 having the maximum inhibition efficiency of 84.29%. The thermodynamic parameters revealed that the adsorption of the Schiff base and its complexes on the metal surface was spontaneous, endothermic and followed physical adsorption mechanism which conformed perfectly to the Langmuir adsorption isotherm. PDP measurements showed that the Schiff base and its metal complexes acted as mixed type inhibitors. The inhibition efficiency values obtained from the different techniques were comparable. SEM analyses of the corrosion product also confirmed the formation of a protective layer on the metal surface.
| Published in | Science Journal of Chemistry (Volume 11, Issue 5) |
| DOI | 10.11648/j.sjc.20231105.11 |
| Page(s) | 168-188 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2023. Published by Science Publishing Group |
Corrosion Inhibition, Schiff Base Ligand, Synthesis, Characterisation
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APA Style
Chimezie Peter Ozoemena, Ekerete Jackson Boekom, Ekaete Jacob Abai, Essien Kufre Edet, Inemesit Asuquo Akpan. (2023). Schiff Base and Its Metal Complexes as Ecofriendly Pitting Corrosion Inhibitors on ASTM-A36 Low Carbon Steel in Corrosive Oil and Gas Well Treatment Fluids. Science Journal of Chemistry, 11(5), 168-188. https://doi.org/10.11648/j.sjc.20231105.11
ACS Style
Chimezie Peter Ozoemena; Ekerete Jackson Boekom; Ekaete Jacob Abai; Essien Kufre Edet; Inemesit Asuquo Akpan. Schiff Base and Its Metal Complexes as Ecofriendly Pitting Corrosion Inhibitors on ASTM-A36 Low Carbon Steel in Corrosive Oil and Gas Well Treatment Fluids. Sci. J. Chem. 2023, 11(5), 168-188. doi: 10.11648/j.sjc.20231105.11
AMA Style
Chimezie Peter Ozoemena, Ekerete Jackson Boekom, Ekaete Jacob Abai, Essien Kufre Edet, Inemesit Asuquo Akpan. Schiff Base and Its Metal Complexes as Ecofriendly Pitting Corrosion Inhibitors on ASTM-A36 Low Carbon Steel in Corrosive Oil and Gas Well Treatment Fluids. Sci J Chem. 2023;11(5):168-188. doi: 10.11648/j.sjc.20231105.11
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Download@article{10.11648/j.sjc.20231105.11,
author = {Chimezie Peter Ozoemena and Ekerete Jackson Boekom and Ekaete Jacob Abai and Essien Kufre Edet and Inemesit Asuquo Akpan},
title = {Schiff Base and Its Metal Complexes as Ecofriendly Pitting Corrosion Inhibitors on ASTM-A36 Low Carbon Steel in Corrosive Oil and Gas Well Treatment Fluids},
journal = {Science Journal of Chemistry},
volume = {11},
number = {5},
pages = {168-188},
doi = {10.11648/j.sjc.20231105.11},
url = {https://doi.org/10.11648/j.sjc.20231105.11},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sjc.20231105.11},
abstract = {A high yield (74.63%) bidentate Schiff base ligand was synthesized from the condensation reaction of 4-aminophenol and 4-diethylamino-2-hydroxybenzaldehyde by the reflux method. Its transition metal complexes of Ni, Cu and Zn were prepared from the corresponding metal salts in methanol solution using the same procedure. The chemical structure of the synthesized Schiff base and its metal complexes was characterized by physicochemical, spectral analysis (FTIR and UV-Visible), and molar conductivity studies which revealed that the metal complexes were non electrolytic. Elemental analysis data for the Schiff base ligand and its metal complexes were used to confirm the general formula of the compound. The spectral data showed that coordination occurred through the azomethine nitrogen atom and the oxygen atom of the phenolic ring. The corrosion inhibition of Schiff base and its metal complexes was evaluated using potentiodynamic polarization (PDP), linear polarization resistance (LPR), and weight loss (WL) methods in acidic oil and gas well treatment fluid. The corrosive fluid was simulated using 1 M HCl solution. The results indicated that the compounds had a promising inhibitory effect on the corrosion of ASTM-A36 low carbon steel in the medium. The effectiveness of the inhibitors decreased with increasing time and temperature, but improved with increasing concentration of the inhibitors. The metal complexes showed a synergistic effect against Schiff base, with NiL1 having the maximum inhibition efficiency of 84.29%. The thermodynamic parameters revealed that the adsorption of the Schiff base and its complexes on the metal surface was spontaneous, endothermic and followed physical adsorption mechanism which conformed perfectly to the Langmuir adsorption isotherm. PDP measurements showed that the Schiff base and its metal complexes acted as mixed type inhibitors. The inhibition efficiency values obtained from the different techniques were comparable. SEM analyses of the corrosion product also confirmed the formation of a protective layer on the metal surface.},
year = {2023}
}
TY - JOUR T1 - Schiff Base and Its Metal Complexes as Ecofriendly Pitting Corrosion Inhibitors on ASTM-A36 Low Carbon Steel in Corrosive Oil and Gas Well Treatment Fluids AU - Chimezie Peter Ozoemena AU - Ekerete Jackson Boekom AU - Ekaete Jacob Abai AU - Essien Kufre Edet AU - Inemesit Asuquo Akpan Y1 - 2023/09/15 PY - 2023 N1 - https://doi.org/10.11648/j.sjc.20231105.11 DO - 10.11648/j.sjc.20231105.11 T2 - Science Journal of Chemistry JF - Science Journal of Chemistry JO - Science Journal of Chemistry SP - 168 EP - 188 PB - Science Publishing Group SN - 2330-099X UR - https://doi.org/10.11648/j.sjc.20231105.11 AB - A high yield (74.63%) bidentate Schiff base ligand was synthesized from the condensation reaction of 4-aminophenol and 4-diethylamino-2-hydroxybenzaldehyde by the reflux method. Its transition metal complexes of Ni, Cu and Zn were prepared from the corresponding metal salts in methanol solution using the same procedure. The chemical structure of the synthesized Schiff base and its metal complexes was characterized by physicochemical, spectral analysis (FTIR and UV-Visible), and molar conductivity studies which revealed that the metal complexes were non electrolytic. Elemental analysis data for the Schiff base ligand and its metal complexes were used to confirm the general formula of the compound. The spectral data showed that coordination occurred through the azomethine nitrogen atom and the oxygen atom of the phenolic ring. The corrosion inhibition of Schiff base and its metal complexes was evaluated using potentiodynamic polarization (PDP), linear polarization resistance (LPR), and weight loss (WL) methods in acidic oil and gas well treatment fluid. The corrosive fluid was simulated using 1 M HCl solution. The results indicated that the compounds had a promising inhibitory effect on the corrosion of ASTM-A36 low carbon steel in the medium. The effectiveness of the inhibitors decreased with increasing time and temperature, but improved with increasing concentration of the inhibitors. The metal complexes showed a synergistic effect against Schiff base, with NiL1 having the maximum inhibition efficiency of 84.29%. The thermodynamic parameters revealed that the adsorption of the Schiff base and its complexes on the metal surface was spontaneous, endothermic and followed physical adsorption mechanism which conformed perfectly to the Langmuir adsorption isotherm. PDP measurements showed that the Schiff base and its metal complexes acted as mixed type inhibitors. The inhibition efficiency values obtained from the different techniques were comparable. SEM analyses of the corrosion product also confirmed the formation of a protective layer on the metal surface. VL - 11 IS - 5 ER -
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