Abstract

A novel chitosan oligosaccharide macromolecule carrying a glucose moiety (COS-g-Glu) has been synthesized and used as a non-toxic, durable, and biodegradable inhibitor of mild steel corrosion in acidic medium (1.0 M HCl). This macromolecule was synthesized by grafting a glucose moiety on Chitosan, and characterized by FT-IR, ¹H and ¹³C NMR. The acid corrosion inhibiting effect of this biodegradable macromolecule is obtained by experimental electrochemical characterization (EIS and PDP), surface [Scanning Electron Spectroscopy (SEM), Energy Dispersive Spectroscopy (EDS), infrared (FT-IR), and Atomic Force Microscopy (AFM)]. Corrosive acidic solutions were identified by UV–visible spectroscopy (UV–vis) and by ICP-OES spectrometry. Electrochemical tests show that the inhibition efficiency increases with increasing concentration of the inhibitor and reaches an optimum value of 97% at 10⁻³ M. The thermodynamic parameters, and steel surface characterization methods confirmed the adsorption of COS-g-Glu. The results obtained from the DFT, and MD calculations correlate with the results obtained experimentally.

Title

Ismail

Publisher

warad

Publisher Country

Palestine

Publication Type

Prtinted only

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Year

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Pages

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