The Inhibition of Carbon Steel Corrosion in Hydrochloric Acid Media Using 2-((5-methyl-isoxazol-3-yl)-methyl)-benzimidazole

Abstract Carbon steel corrosion inhibition in a hydrochloric acid solution by 2-((5-methyl-isoxazol-3-yl)-methyl)-benzimidazole (MMB) has been studied by electrochemical techniques (PDP and EIS). Results showed that the inhibition efficiency increases with higher MMB concentration, and the maximum v...

ver descrição completa

Detalhes bibliográficos
Autor principal: Sebhaoui,J. (author)
Outros Autores: Aoufir,Y. El (author), Bakri,Y. El (author), Bourazmi,H. (author), Ali,A. Ben (author), Guenbour,A. (author), Oudda,H. (author), Zarrouk,A. (author), Essassi,E.M. (author)
Formato: article
Idioma:eng
Publicado em: 2021
Assuntos:
carbon steel
corrosion inhibition
Benzimidazole
electrochemical techniques
Texto completo:http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042021000300213
País:Portugal
Oai:oai:scielo:S0872-19042021000300213
Descrição
Resumo:Abstract Carbon steel corrosion inhibition in a hydrochloric acid solution by 2-((5-methyl-isoxazol-3-yl)-methyl)-benzimidazole (MMB) has been studied by electrochemical techniques (PDP and EIS). Results showed that the inhibition efficiency increases with higher MMB concentration, and the maximum value of 86.6% was obtained at 10-3 M concentration. The prepared benzimidazole inhibitor showed higher inhibition efficiency upon raising the solution temperature from 303 to 333 K. Corrosion current density decreased from 660.9 µA cm-2 (blank) to 97.8 µA cm-2 (MMB) and charge transfer resistance increased from 20.2 Ω cm2 (blank) to 150.8 Ω cm2 (MMB). PDP studies showed that MMB is a mixed type inhibitor. The adsorption of this compound onto the carbon steel surface in a 1 M HCl solution followed the Langmuir adsorption isotherm, and the value of the standard free energy of adsorption () is associated to physisorption and chemisorption.

Registos relacionados