Synthesis of biomass derived product from Ziziphus spina-christi and application for surface protection of metal under acidic environment- Performance evaluation and thermodynamic studies.

The aqueous extract synthesized using the biomass, Ziziphus spina-christi, was applied to protect the surface of aluminium under acidic environment. The influence of extract concentration (0-0.14 mg/ml), contact time (2-8 h) and temperature (303.15-313.15 K) on the inhibition efficiency was studied. Langmuir isotherm fitted well to the experimental observations (R2 > 0.960) confirmed the monolayer attachment of inhibitors. The values of activation energy observed in this study suggests that the inhibition process to be surface interaction-based process. Thermodynamic parameters confirmed the process as feasible and exothermic. Potentiodynamic polarization and Electrochemical impedance spectroscopy studies are conducted to study the mechanism of corrosion. The electrochemical corrosion kinetics was studied using current density-potential curves and the Tafel constants (βa and βc) were calculated as 154.42 and 128.35 mV, at 0.14 mg/mL of inhibitor concentration. The biomass-based corrosion inhibitor was characterized using scanning electron microscope and attenuated total reflection techniques. Copyright © 2021 Elsevier Ltd. All rights reserved.

Citation

Rajamohan Natarajan, Fatema Said Zahir Said Al Shibli. Synthesis of biomass derived product from Ziziphus spina-christi and application for surface protection of metal under acidic environment- Performance evaluation and thermodynamic studies. Chemosphere. 2021 Dec;284:131375

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PMID: 34217928

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