Lignin-Based ILs as Corrosion Inhibitors

Sharon Monaci; Daniela Minudri; Lorenzo Guazzelli; Andrea Mezzetta; David Mecerreyes; Maria Forsyth; Anthony Somers

doi:10.20944/preprints202307.0031.v1

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preprints.org > chemistry and materials science > applied chemistry > doi: 10.20944/preprints202307.0031.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Lignin-Based ILs as Corrosion Inhibitors

Version 1 : Received: 3 July 2023 / Approved: 3 July 2023 / Online: 4 July 2023 (02:23:59 CEST)

A peer-reviewed article of this Preprint also exists.

Monaci, S.; Minudri, D.; Guazzelli, L.; Mezzetta, A.; Mecerreyes, D.; Forsyth, M.; Somers, A. Lignin-Derivative Ionic Liquids as Corrosion Inhibitors. Molecules 2023, 28, 5568. Monaci, S.; Minudri, D.; Guazzelli, L.; Mezzetta, A.; Mecerreyes, D.; Forsyth, M.; Somers, A. Lignin-Derivative Ionic Liquids as Corrosion Inhibitors. Molecules 2023, 28, 5568.

Abstract

In this work, the inhibition properties of new bio-based lignine ILs on the corrosion of mild steel in an aqueous solution of 0.01 M NaCl were investigated by Potentiostatic Electrochemical Impedance Spectroscopy (PEIS), Cyclic Potentiodynamic Polarization (CPP). Moreover, the surface was characterized using SEM, EDS, and optical profilometry. The influence of cation and anion on the inhibitor properties and a possible synergistic effect were investigated. The IL choline syringate showed a promising performance, reducing the corrosion current after 24-hour immersion in 0.01 M sodium chloride, from 1.66 µA/cm2 for the control to 0.066 µA/cm2 with 10 mM of the IL present. In addition to the performance as a corrosion inhibitor, both components of this IL also meet or exceed current additional desired properties of such compounds, being readily available, economically efficient, and well tolerated in organisms and the environment.

Keywords

Ionic Liquids; Corrosion Inhibitors; Bio-based

Subject

Chemistry and Materials Science, Applied Chemistry

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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