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Journal of Engineering and Applied Sciences

ISSN: Online 1818-7803
ISSN: Print 1816-949x
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The Inhibition and Adsorption Processes of L-Cysteine Against the Corrosion of XC 18 Carbon Steel in 2N H2SO4

L. Touafri , A. Kadri , A. Khelifa , N. Aimeur and N. Benbrahim
Page: 688-696 | Received 21 Sep 2022, Published online: 21 Sep 2022

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https://doi.org/10.36478/jeasci.2008.688.696

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Abstract

The inhibition effect of L-cysteine as environmentally friendly corrosion inhibitor for XC 18 carbon steel in stirred 2 N sulphuric acid has been investigated by electrochemical techniques. The impedance measurements showed that the inhibition efficiency increased with the increase of inhibitor concentration to reach more than 84% at 500 mg L-1 and indicated that the amino acid act as mixed type inhibitor, while the adsorption followed the Langmuir isotherm. Effect of temperature is also studied in the 30-60°C range. The values of adsorption free energy ( G0ads) and activation energies (Ea) reveal a physical adsorption of the inhibitor on the steel surface.

How to cite this article:

L. Touafri , A. Kadri , A. Khelifa , N. Aimeur and N. Benbrahim . The Inhibition and Adsorption Processes of L-Cysteine Against the Corrosion of XC 18 Carbon Steel in 2N H2SO4.
DOI: https://doi.org/10.36478/jeasci.2008.688.696
URL: https://www.makhillpublications.co/view-article/1816-949x/jeasci.2008.688.696