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Vol. 35 No. 8 (2023): Vol 35 Issue 8, 2023

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Corrosion Inhibition Potential of Cymbopogon citratus (Lemongrass) Leaves Extract on Mild Steel in 0.1 M Sulphuric Acid Medium at Different Temperatures

https://doi.org/10.14233/ajchem.2023.27966
Amit Kumar Nunach
Department of Chemistry, Chaudhary Devi Lal University, Sirsa-125055, India
https://orcid.org/0009-0002-9517-0389
Gita Rani
Department of Chemistry, Chaudhary Devi Lal University, Sirsa-125055, India
https://orcid.org/0000-0002-7765-1894
Rachna Ahlawat
Department of Physics, Chaudhary Devi Lal University, Sirsa-125055, India

Corresponding Author(s) : Gita Rani

gitarani@cdlu.ac.in

Asian Journal of Chemistry, Vol. 35 No. 8 (2023): Vol 35 Issue 8, 2023

Abstract

The role of the phytochemicals in Cymbopogon citratus (Lemongrass) plant is significant in preventing the corrosion. The current study investigated the effectiveness of lemongrass leaves extract (at concentrations ranging from 1-6%) in inhibiting the corrosion of mild steel (low carbon) in a corrosive medium of 0.1 M sulphuric acid. The extract was used as a green rust inhibitor at different temperatures (25, 35 and 45 ºC). Electrochemical impedance spectroscopy (EIS) and linear polarization studies were conducted to analyze the electrochemical behaviour and understand the corrosion inhibition mechanism. Additionally, weight loss studies were carried out. At 6% concentration and 25 ºC, lemongrass extract showed 92.01% corrosion inhibition efficiency. The surface analysis of mild steel samples was performed using both metallurgical research micrographs (MRM) and SEM techniques. Based on the results, the study concludes that the lemongrass leaves extract is an excellent green corrosion inhibitor.

Keywords

Cymbopogon citratus (Lemongrass) Corrosion Mild steel Sulphuric acid
Nunach, A. K., Rani, G., & Ahlawat, R. (2023). Corrosion Inhibition Potential of Cymbopogon citratus (Lemongrass) Leaves Extract on Mild Steel in 0.1 M Sulphuric Acid Medium at Different Temperatures. Asian Journal of Chemistry, 35(8), 1810–1818. https://doi.org/10.14233/ajchem.2023.27966
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