Inhibitory effects ofMurraya koenigii(curry leaf) leaf extract on the corrosion of mild steel in 1 M HCl

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Abstract
The inhibitive effect of the Murraya koenigii (curry leaf) leaf extract on the corrosion of mild steel in 1 M HCl was investigated by using weight loss, open circuit potential measurements, potentiostatic polarization techniques, and impedance analysis. The results show that Murraya koenigii extract is an effective corrosion inhibitor for protecting the corrosion of mild steel in 1 M HCl medium even at stimulated conditions. The inhibition efficiency increases with increasing the concentration of the inhibitor in the medium. The percentage inhibitor efficiency under stagnant condition calculated based on weight loss method is found to be above 94.5% when the medium contains 1000 ppm of the inhibitor.

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