Employing Cymbopogon citratus (Lemongrass) as eco-friendly corrosion inhibitor for mild steel in seawater

Mohammad Fakhratul Ridwan Zulkifli, . and Mohd Sabri Mohd Ghazali, . and Kamal Chennapan, . and Haque Jiyaul, . and Nabilah Binti Ismail, . and Wan Mohd Norsani Wan Nik, . and Umoren Saviour Alphonsus, . Employing Cymbopogon citratus (Lemongrass) as eco-friendly corrosion inhibitor for mild steel in seawater. pp. 71-82. ISSN 2672-7226

Cymbopogon citratus (lemongrass) is a common plant in Southeast Asia that is rich in phytochemical compounds such as flavonoids phenolics and tannins. These compounds play an essential role in corrosion-inhibition processes. The characterization of the extract was done by Fourier Transform Infrared and UV-Vis Spectroscopy. The anticorrosion action of lemongrass extract was evaluated for mild steel through immersion in seawater medium using weight-loss and Electrochemical Impedence Spectroscopy. The surface analysis was carried out by optical and Scanning Electron Microscope. The mild steel grade JR235 was prepared in size of 25 mm 25 mm 3 mm and was polished using a stand grinder. The immersion test was conducted in seawater with different concentrations of lemongrass extract for a duration of 50 days. Meanwhile the amount of lemongrass extract incorporated varied from 5 0.1 15 to 20. Six characterizations were conducted in this study which are weight-loss study Fourier Transform Infrared UV-Vis spectroscopy Electrochemical Impedance Spectroscopy Optical Microscope and Scanning Electron Microscope. In this study a major constituent recorded was lawsone which can impede corrosion on metal surfaces. The results indicated that weight loss without additive was higher compared to other samples with additives. The weight-loss results show that 10 and 20 additive managed to reduce corrosion by 0.07104 and 0.16234 compared to without additives respectively. Charge transfer resistance increases up to 3.2x10� .cm with the presence of 20 additive. Surface studies results reveal that additives significantly improve the smoothness of the mild steel surface. Thus this study finds that lemongrass is a potential functional natural additive for steel particularly mild steel in seawater medium.

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Abstract

Cymbopogon citratus (lemongrass) is a common plant in Southeast Asia that is rich in phytochemical compounds such as flavonoids phenolics and tannins. These compounds play an essential role in corrosion-inhibition processes. The characterization of the extract was done by Fourier Transform Infrared and UV-Vis Spectroscopy. The anticorrosion action of lemongrass extract was evaluated for mild steel through immersion in seawater medium using weight-loss and Electrochemical Impedence Spectroscopy. The surface analysis was carried out by optical and Scanning Electron Microscope. The mild steel grade JR235 was prepared in size of 25 mm 25 mm 3 mm and was polished using a stand grinder. The immersion test was conducted in seawater with different concentrations of lemongrass extract for a duration of 50 days. Meanwhile the amount of lemongrass extract incorporated varied from 5 0.1 15 to 20. Six characterizations were conducted in this study which are weight-loss study Fourier Transform Infrared UV-Vis spectroscopy Electrochemical Impedance Spectroscopy Optical Microscope and Scanning Electron Microscope. In this study a major constituent recorded was lawsone which can impede corrosion on metal surfaces. The results indicated that weight loss without additive was higher compared to other samples with additives. The weight-loss results show that 10 and 20 additive managed to reduce corrosion by 0.07104 and 0.16234 compared to without additives respectively. Charge transfer resistance increases up to 3.2x10� .cm with the presence of 20 additive. Surface studies results reveal that additives significantly improve the smoothness of the mild steel surface. Thus this study finds that lemongrass is a potential functional natural additive for steel particularly mild steel in seawater medium.

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Item Type:	Article
AGROVOC Term:	Cymbopogon citratus
AGROVOC Term:	Lemon grass
AGROVOC Term:	Flavonoids
AGROVOC Term:	Tannins
AGROVOC Term:	Sampling
AGROVOC Term:	Additives
AGROVOC Term:	Sea water
AGROVOC Term:	Corrosion
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/9820

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