Experimental and theoretical evaluations on Oleuropein as a natural origin corrosion inhibitor for copper in acidic environment.

Publisher: Nature Publishing Group Country of Publication: England NLM ID: 101563288 Publication Model: Electronic Cited Medium: Internet ISSN: 2045-2322 (Electronic) Linking ISSN: 20452322 NLM ISO Abbreviation: Sci Rep Subsets: MEDLINE

Original Publication: London : Nature Publishing Group, copyright 2011-

Copper*/chemistry ; Iridoid Glucosides*; Acids/chemistry ; Corrosion ; Spectroscopy, Fourier Transform Infrared

Copper corrosion in acidic cleaning solutions is a major worry for heat exchangers. Corrosion inhibitors derived from natural sources might be a viable option. The isolation of Oleuropein compound from olive leaf and investigation of its anticorrosion potential for copper in 1.0 M H 2 SO 4 solution are reported here. All experimental results from LC-MS, FT-IR, ¹ H and ¹³ C-NMR characterizations support the molecular structure of Oleuropein. Electrochemical and gravimetric tests were used to evaluate the corrosion inhibition capabilities of Oleuropein. According to polarization investigation, Oleuropein is a mixed-type inhibitor. Oleuropein's inhibitory efficacy increases with concentration, attaining an optimum value (98.92%) at 100 mg L ^-1 . At high temperatures, Oleuropein can be considered an efficient inhibitor. Thermodynamic variables for the activation operation and copper dissolution were computed and addressed as well. Scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) examinations revealed that Oleuropein produced an outer layer on the copper surface, shielding it from severe acid damage. Quantum chemical simulations were employed to propose molecular explanations for Oleuropein's inhibitory actions.
(© 2022. The Author(s).)

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0 (Acids)
0 (Iridoid Glucosides)
2O4553545L (oleuropein)
789U1901C5 (Copper)

Date Created: 20220509 Date Completed: 20220511 Latest Revision: 20221230

20221231

PMC9085739

10.1038/s41598-022-11598-7

35534610