Low cost aqueous extract of Pisum sativum peels for inhibition of mild steel corrosion

This work investigates the potential of Pisum sativum (green pea) peels for the inhibition of mild steel corrosion in hydrochloric acid (HCl) at varied temperatures. Various techniques, like weight loss measurements, tafel polarization curves, electrochemical impedance spectroscopy (EIS), UV–visible...

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Bibliographic Details
Published in:Journal of molecular liquids 2018-03, Vol.254, p.357-368
Main Authors: Srivastava, Monika, Tiwari, Preeti, Srivastava, S.K., Kumar, Ashish, Ji, Gopal, Prakash, Rajiv
Format: Article
Language:English
Subjects:
Corrosion
DFT
EIS
Ion chromatography
Mild steel
Peel extract
Pisum sativum
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Summary:This work investigates the potential of Pisum sativum (green pea) peels for the inhibition of mild steel corrosion in hydrochloric acid (HCl) at varied temperatures. Various techniques, like weight loss measurements, tafel polarization curves, electrochemical impedance spectroscopy (EIS), UV–visible and Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and atomic force microscopy (AFM), have been used to test the inhibition properties of aqueous Pisum sativum peels extract (APSPE) in acid media. The results indicate that APSPE effectively inhibits the corrosion of mild steel by covering the active corrosion sites on the mild steel surface and thus lowers the electrochemical activity of the surface exposed in HCl solution. The maximum inhibition efficiencies of APSPE system at 400 mg L−1 concentration in 1 M HCl are reported as: 91%, weight loss; 87% polarization curves; and 90% by EIS. The corrosion behavior of mild steel in presence of APSPE has also been investigated in the range of 1 to 4 M HCl at room temperature as well as at varied temperatures (303−333 K) in 1 M HCl. The process of mild steel corrosion inhibition in HCl by APSPE has been explained by ion chromatography analysis and DFT calculations. •Waste Pisum Sativum peels are utilized in inhibition of mild steel corrosion loss.•Mild steel loss can be inhibited with 91% efficiency by 400 mg L−1 of the extract.•Effects of temperature rise and acid concentration are also monitored.•Ion chromatography is used to support the electrochemical results.•Pro inhibition behavior of the extract molecules is explained with DFT calculations.
ISSN:0167-7322
1873-3166
DOI:10.1016/j.molliq.2018.01.137