Inhibitory Effect of Essential Oil from Rond Left Mint (Mentha Rotundifolia) on the Corrosion of C35 Mild Steel in an Acidic Environment http://www.doi.org/10.26538/tjnpr/v7i12.38
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Abstract
Metals such as iron are a target of different oxidative agents in acidic environments inducing significant economic losses. Ecological inhibitors of corrosion constitute an excellent alternative to chemical agents. Therefore, the scientific community proceeded to the use of plant extracts, including essential oils as inhibitors, presenting a cost-effective way to reduce steel losses. The present study was conducted to investigate the anticorrosive effect of Mentha rotundifolia essential oil in an acidic environment. Mentha rotundifolia essential oil was recovered using Clevenger apparatus. Different concentrations of essential oil were prepared (0.5, 1, 1.5, and 2g/L) to examine their anticorrosive impact on C35 steel in an acidic environment using 1M HCl by calculating electrochemical impedance, spectroscopic polarization curves, and weight loss measurement.
The results revealed that the essential oil yield was 1.58%. The EO showed an interesting anticorrosive effect at a concentration of 1g/L. Furthermore, the application of the EO at a concentration of 0.5g/L exhibited a higher anticorrosive effect by increasing double-layer capacitance to Cdl (77.41 µE/cm2). The findings of the study revealed that Mentha rotundifolia essential oil, at varying concentrations, effectively inhibited steel corrosion in an acidic environment.
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