Synthesis and characterization of pyridinium-based dicationic ionic liquid and its application in corrosion mitigation of 6061Al-10(vol%) SiC(p) composite in 0.05M HCl

Document Type

Article

Publication Title

Journal of Molecular Liquids

Abstract

In the present investigation, a novel ionic liquid, 4,4′-(hydrazine-1,2-diylidenebis(methanylylidene))bis(1-(2,3-dihydroxypropyl)pyridin-1-ium) chloride (HMP), was synthesized and comprehensively characterized. The electrochemical performance of HMP as a corrosion inhibitor for 6061Al–10 vol% SiC metal matrix composite (6061Al-CM) was evaluated in 0.05M HCl solution. Electrochemical measurements revealed that HMP exhibited a maximum inhibition efficiency of 94 % at 303 K. The compound functioned as a mixed-type inhibitor, predominantly undergoing physisorption, and obeyed the Langmuir adsorption isotherm. Surface morphological analysis using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and atomic force microscopy (AFM) confirmed the formation of a protective inhibitor film on the composite surface. Furthermore, quantum chemical calculations based on density functional theory (DFT) provided insights into the electronic properties of HMP and its adsorption behavior on the metal surface.

DOI

10.1016/j.molliq.2025.128098

Publication Date

10-1-2025

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