Anticorrosion performance of biopolymer pectin on 6061 aluminium alloy: Electrochemical, spectral and theoretical approach

被引:22
作者
Fathima, Huda [1 ]
Pais, Mikitha [1 ]
Rao, Padmalatha [1 ]
机构
[1] Manipal Acad Higher Educ, Dept Chem, MIT, Manipal, Karnataka, India
关键词
Electrochemical studies; Spectroscopy; Surface morphology; Computational calculations; Green inhibitor; MILD-STEEL CORROSION; HYDROCHLORIC-ACID; CARBON-STEEL; INHIBITION PERFORMANCE; TRIAZOLE DERIVATIVES; ADSORPTION BEHAVIOR; SIC(P) COMPOSITE; SULFURIC-ACID; IONIC LIQUIDS; AL-ALLOY;
D O I
10.1016/j.molstruc.2021.130775
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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.
引用
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页数:11
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