Electrochemical and Thermodynamic Investigation on Corrosion Inhibition of C38 Steel in 1M Hydrochloric Acid Using the Hydro-Alcoholic Extract of Used Coffee Grounds

Fatima Bouhlal; Najoua Labjar; Farah Abdoun; Aimad Mazkour; Malika Serghini-Idrissi; Mohammed El Mahi; El Mostapha Lotfi; Souad El Hajjaji

doi:10.1155/2020/4045802

International Journal of Corrosion (Jan 2020)

Electrochemical and Thermodynamic Investigation on Corrosion Inhibition of C38 Steel in 1M Hydrochloric Acid Using the Hydro-Alcoholic Extract of Used Coffee Grounds

Fatima Bouhlal,
Najoua Labjar,
Farah Abdoun,
Aimad Mazkour,
Malika Serghini-Idrissi,
Mohammed El Mahi,
El Mostapha Lotfi,
Souad El Hajjaji

Affiliations

Fatima Bouhlal: Laboratory of Spectroscopy, Molecular Modelling Materials, Nanomaterials, Water and Environment, CERNE2D, ENSET, Mohamed V University, Rabat, Morocco
Najoua Labjar: Laboratory of Spectroscopy, Molecular Modelling Materials, Nanomaterials, Water and Environment, CERNE2D, ENSET, Mohamed V University, Rabat, Morocco
Farah Abdoun: Center STIS, M2CS, ENSET, Mohamed V University, Rabat, Morocco
Aimad Mazkour: Laboratory of Spectroscopy, Molecular Modelling, Materials, Nanomaterials, Water and Environment, CERNE2D, Faculty of Sciences, Mohamed V University, Rabat, Morocco
Malika Serghini-Idrissi: Laboratory of Spectroscopy, Molecular Modelling, Materials, Nanomaterials, Water and Environment, CERNE2D, Faculty of Sciences, Mohamed V University, Rabat, Morocco
Mohammed El Mahi: Laboratory of Spectroscopy, Molecular Modelling Materials, Nanomaterials, Water and Environment, CERNE2D, ENSET, Mohamed V University, Rabat, Morocco
El Mostapha Lotfi: Laboratory of Spectroscopy, Molecular Modelling Materials, Nanomaterials, Water and Environment, CERNE2D, ENSET, Mohamed V University, Rabat, Morocco
Souad El Hajjaji: Laboratory of Spectroscopy, Molecular Modelling, Materials, Nanomaterials, Water and Environment, CERNE2D, Faculty of Sciences, Mohamed V University, Rabat, Morocco

DOI: https://doi.org/10.1155/2020/4045802
Journal volume & issue: Vol. 2020

Abstract

Read online

The present work investigates the influence of temperature on C38 steel corrosion in a 1 M HCl medium with and without different concentrations of a hydro-alcoholic extract of used coffee grounds (HECG). The potentiodynamic polarization technique and the electrochemical impedance spectroscopy were performed in temperatures ranging from 293.15 to 323.15 K. It was observed that the inhibition efficiency decreased with increased temperature and inhibitor concentration. The HECG adsorption process on C38 steel surface was found to be spontaneous and obeyed to Langmuir isotherm at all studied temperatures. The associated thermodynamic parameters of adsorption led to suggest the occurrence of physical adsorption of the HECG compounds on the C38 steel surface.

Published in International Journal of Corrosion

ISSN: 1687-9325 (Print); 1687-9333 (Online)
Publisher: Wiley
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://onlinelibrary.wiley.com/journal/7572

About the journal