Journal
JOURNAL OF MOLECULAR STRUCTURE
Volume 1243, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.molstruc.2021.130775
Keywords
Electrochemical studies; Spectroscopy; Surface morphology; Computational calculations; Green inhibitor
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The study demonstrated that pectin, as an environmentally friendly inhibitor, can effectively reduce acid corrosion of aluminum alloy with an inhibition efficiency of around 80%. Through methods such as electrochemical, spectroscopic, and quantum chemical calculations, the adsorption mode of pectin on the alloy surface and the corrosion inhibition mechanism were deeply investigated.
Pectin (PECT), a carbohydrate polymer, is presented as an active, environmentally benign inhibitor to attenuate the 6061 aluminium alloy acid corrosion. The study was performed by adopting electrochemical and spectroscopic procedures. Surface studies were performed by scanning electron microscopy (SEM), energy dispersion X-ray studies (EDX), and atomic force microscopic (AFM) technique. Mode of adsorption of PECT on the surface of the alloy was arrived at by applying appropriate adsorption isotherm, which is further confirmed spectral studies like FT-IR and UV-visible spectroscopy. Adsorption of PECT was reiterated by quantum chemical calculations using density functional theory (DFT). Pectin emerged as a potent green inhibitor with an inhibition efficiency of around 80% for the addition of 800 ppm of it. DFT calculations contributed a deeper insight in systematic understanding of the mechanism of the corrosion inhibition process. (c) 2021 Elsevier B.V. All rights reserved.
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