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AuthorElyor, Berdimurodov
AuthorKholikov, Abduvali
AuthorAkbarov, Khamdam
AuthorGuo, Lei
AuthorAbdullah, Aboubakr M.
AuthorElik, Mustafa
Available date2022-09-26T09:30:04Z
Publication Date2021-04-15
Publication NameJournal of Molecular Liquids
Identifierhttp://dx.doi.org/10.1016/j.molliq.2021.115475
CitationBerdimurodov, E., Kholikov, A., Akbarov, K., Guo, L., Abdullah, A. M., & Elik, M. (2021). A gossypol derivative as an efficient corrosion inhibitor for St2 steel in 1 M HCl+ 1 M KCl: An experimental and theoretical investigation. Journal of Molecular Liquids, 328, 115475.‏
ISSN01677322
URIhttps://www.sciencedirect.com/science/article/pii/S0167732221002014
URIhttp://hdl.handle.net/10576/34493
AbstractCurrently, there are several types of corrosion inhibitors were studied. The new type of corrosion inhibitor based on a gossypol derivative was first introduced. The anti-corrosion performance of 6-aminopenicillanic acid sodium gossypol (APASG) for St2 steel in a 1 M HCl + 1 M KCl solution was reported for the first time, and the inhibition properties of this material were fully characterized by gravimetric analysis, thermodynamic analysis, potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), electrochemical noise (EN) analysis, electrochemical frequency modulation (EFM), density functional theory (DFT), molecular dynamics (MD) simulations, scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDX). The obtained results show that APASG is an excellent anti-corrosion inhibitor (97% at 100 mg/L/0.104 mM) at intermediate temperatures (303−333K). APASG adsorbed onto a metal surface by a physical and chemical adsorption mechanism, as shown by the Langmuir adsorption isotherms. Electrochemical analyses show that APASG acts as a mixed-type inhibitor. The thermodynamic adsorption data were measured and discussed. SEM-EDX tests of the inhibited steel sample show that the inhibitor significantly improved the surface morphology. DFT calculations indicated that the broadly stretched linked functional groups (hydroxyl and carboxyl) and heteroatoms (nitrogen, oxygen and sulfur) in the inhibitor structure are responsible for the inhibition efficiency of APASG. The obtained DFT and MD simulation data supported the experimental results.
Languageen
PublisherElsevier B.V.
SubjectCorrosion inhibition
Gossypol derivative
Carbon steel
DFT
MD simulation
TitleA gossypol derivative as an efficient corrosion inhibitor for St2 steel in 1 M HCl + 1 M KCl: An experimental and theoretical investigation
TypeArticle
Volume Number328
dc.accessType Abstract Only


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