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Exploration of corrosion inhibition performance of biocompatible ionic liquids: Effect of switching the anions.

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Title: Exploration of corrosion inhibition performance of biocompatible ionic liquids: Effect of switching the anions.
Authors: Aslam, Ruby1,2 (AUTHOR), Aslam, Afroz3 (AUTHOR), Wang, Qihui1 (AUTHOR), Mobin, Mohammad4 (AUTHOR), Yan, Zhitao1,5 (AUTHOR) yanzhitao@cqu.edu.cn
Source: Journal of Molecular Structure. Apr2025, Vol. 1327, pN.PAG-N.PAG. 1p.
Subjects: X-ray photoelectron spectroscopy, Mild steel, Molecular structure, Amino acids, Steel corrosion
Abstract: • Two biocompatible choline amino acid ionic liquids were developed as a corrosion inhibitors. • ChoCys and ChoHis ILs exhibited 97.6 % and 94.6 %, respectively at 303 K. • Potentiodynamic polarization study suggested mixed type bahaviour of both ILs. • UV–vis., FT-IR and XPS studies verified the metal/inhibitors interaction. • In-depth molecular understanding was achieved through DFT and MD simulation studies. This work reports the development of green bio-based ionic liquids (ILs) using choline hydroxide and l-histidine and l-cysteine amino acids, referred to as ChoHis and ChoCys, respectively. Using 1H NMR and FT-IR spectroscopy, the molecular structures of the synthesized ILs were confirmed. Further, using various techniques such as weight loss, electrochemical, surface analysis, and theoretical studies, the anti-corrosive efficacy of the synthesized ILs was examined for mild steel under acid pickling conditions. The analysis of experimental results confirmed that the inhibitors' performance improved with increasing ILs concentration in 5 % HCl solution, reaching 97.6 % and 94.6 % for ChoCys and ChoHis ILs, respectively, at 333 K after 6 hr immersion in corrosive solution. The immersion test results revealed that the synthesized inhibitors maintained high corrosion resistance over extended immersion times (upto 72 hr), demonstrating stability and effectiveness under both static and dynamic conditions. SEM in conjunction with EDS revealed the appearance of a smooth surface, indicating ILs adsorption. X-ray photoelectron spectroscopy analysis corroborated the adsorption of ILs. Similar to experimental methods, theoretical calculations also indicated that ChoCys IL performed better in preventing mild steel corrosion than ChoHis IL. [Display omitted] [ABSTRACT FROM AUTHOR]
Copyright of Journal of Molecular Structure is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Exploration of corrosion inhibition performance of biocompatible ionic liquids: Effect of switching the anions.
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  Data: <searchLink fieldCode="AR" term="%22Aslam%2C+Ruby%22">Aslam, Ruby</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Aslam%2C+Afroz%22">Aslam, Afroz</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Qihui%22">Wang, Qihui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mobin%2C+Mohammad%22">Mobin, Mohammad</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yan%2C+Zhitao%22">Yan, Zhitao</searchLink><relatesTo>1,5</relatesTo> (AUTHOR)<i> yanzhitao@cqu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Molecular+Structure%22">Journal of Molecular Structure</searchLink>. Apr2025, Vol. 1327, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22X-ray+photoelectron+spectroscopy%22">X-ray photoelectron spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Mild+steel%22">Mild steel</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+structure%22">Molecular structure</searchLink><br /><searchLink fieldCode="DE" term="%22Amino+acids%22">Amino acids</searchLink><br /><searchLink fieldCode="DE" term="%22Steel+corrosion%22">Steel corrosion</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: • Two biocompatible choline amino acid ionic liquids were developed as a corrosion inhibitors. • ChoCys and ChoHis ILs exhibited 97.6 % and 94.6 %, respectively at 303 K. • Potentiodynamic polarization study suggested mixed type bahaviour of both ILs. • UV–vis., FT-IR and XPS studies verified the metal/inhibitors interaction. • In-depth molecular understanding was achieved through DFT and MD simulation studies. This work reports the development of green bio-based ionic liquids (ILs) using choline hydroxide and l-histidine and l-cysteine amino acids, referred to as ChoHis and ChoCys, respectively. Using 1H NMR and FT-IR spectroscopy, the molecular structures of the synthesized ILs were confirmed. Further, using various techniques such as weight loss, electrochemical, surface analysis, and theoretical studies, the anti-corrosive efficacy of the synthesized ILs was examined for mild steel under acid pickling conditions. The analysis of experimental results confirmed that the inhibitors' performance improved with increasing ILs concentration in 5 % HCl solution, reaching 97.6 % and 94.6 % for ChoCys and ChoHis ILs, respectively, at 333 K after 6 hr immersion in corrosive solution. The immersion test results revealed that the synthesized inhibitors maintained high corrosion resistance over extended immersion times (upto 72 hr), demonstrating stability and effectiveness under both static and dynamic conditions. SEM in conjunction with EDS revealed the appearance of a smooth surface, indicating ILs adsorption. X-ray photoelectron spectroscopy analysis corroborated the adsorption of ILs. Similar to experimental methods, theoretical calculations also indicated that ChoCys IL performed better in preventing mild steel corrosion than ChoHis IL. [Display omitted] [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Molecular Structure is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.molstruc.2024.141193
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Mild steel
        Type: general
      – SubjectFull: Molecular structure
        Type: general
      – SubjectFull: Amino acids
        Type: general
      – SubjectFull: Steel corrosion
        Type: general
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      – TitleFull: Exploration of corrosion inhibition performance of biocompatible ionic liquids: Effect of switching the anions.
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            NameFull: Aslam, Ruby
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            NameFull: Aslam, Afroz
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            NameFull: Wang, Qihui
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            – D: 15
              M: 04
              Text: Apr2025
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              Y: 2025
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