Hexane extract of 
Nigella sativa
 L as eco-friendly corrosion inhibitor for steel 
in 1 M HCl medium

I. El Mounsi
1; H. Elmsellem
2; A. Aouniti
2; H. Bendaha
1; M. Mimouni
1; T. Benhadda
1; R. 
Mouhoub
1; B. El Mahi
2; A. Salhi
2; B. Hammouti
2

Abstract

Hexane extract of Nigella sativa L as eco-friendly corrosion inhibitor for steel in 1 M HCl medium

Author(s): I. El Mounsi 1 , H. Elmsellem 2 , A. Aouniti 2 , H. Bendaha 1 , M. Mimouni 1 , T. Benhadda 1 , R. Mouhoub 1 , B. El Mahi 2 , A. Salhi 2 and B. Hammouti 2

This work is devoted to examine the effectiveness o f the hexane extract of Nigella Sativa L (SH NS) on corrosion of mild steel in 1 M HCl solution using the weight los s measurement at various concentration effects. Pol arization curves and electrochemical impedance spectroscopy ( EIS) methods were employed to evaluate corrosion ra te and inhibition efficiency. The inhibition efficiency wa s found to increase with inhibitors content to atta in 98% (at 0.5g/L). Data obtained from EIS studies were analyz ed to determinate the model inhibition process thro ugh appropriate equivalent circuit model. Inhibition ef ficiency E (%) obtained from the various methods is in good agreement. The associated activation energy has bee n determined. The adsorption of natural products on the steel surface was found obey to Langmuir’s adsorption iso therm.

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