Inhibition of acid corrosion in API 5L X52 steel with 1,2,3-triazole derivatized from benzyl alcohol: Experimental and theoretical studies
Por:
Espinoza Vazquez, A., Gonzalez-Olvera, R., Moreno Cerros, D., Negron Silva, G. E., Figueroa, I. A., Rodriguez Gomez, F. J., Castro, M., Miralrio, A., Huerta, L.
Publicada:
15 oct 2021
Resumen:
This work presents the synthesis of new triazoles derived from benzyl
alcohol to be used as corrosion inhibitors for API 5L X52 steel in HCl
1M medium. The results showed that all derivatives displayed a better
inhibitory capacity than benzyl alcohol. Electrochemical impedance
spectroscopy in conjunction with polarization curves revealed that
compound 6 showed the highest inhibitory capacity of all deriva-tives
with 94.2% inhibition efficiency at a concentration of 50 ppm.
Furthermore, it was determined that compounds 3, 6 and 7 were inhibitors
with anodic behavior and compounds 4 and 5 acted as mixed inhibitors.
Benzyl alcohol and all its synthesized derivatives fitted the Langmuir
adsorption isotherm. The combined adsorption phenomenon was proposed
according to the thermodynamic parameter values obtained.
Dispersion-corrected DFT studies, assuming the cluster approach,
obtained free binding ener-gies that matched well with experimentally
determined standard adsorption free energies. The mixed
physisorption-chemisorption observed was explained in terms of the
electrostatic interactions and chem-ical bonding between the metal
surface and the corrosion inhibitor. Finally, compound 6 obtained the
largest charge transference to the metal cluster. (c) 2021 Elsevier B.V.
All rights reserved.
Filiaciones:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior S-N, Ciudad De Mexico 04360, Mexico
Univ Nacl Autonoma Mexico, Fac Quim, Dept Ingn Met, Ciudad De Mexico 04510, Mexico
Univ Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Unidad Multidisciplinaria Invest Expt, Batalla 5 Mayo S-N Esquina Fuerte Loreto, Ciudad De Mexico 09230, Mexico
Univ Autonoma Metropolitana Azcapotzalco, Dept Ciencias Basicas, Av San Pablo 180, Ciudad De Mexico 02200, Mexico
Univ Nacl Autonoma Mexico, DEPg Fac Quim, Dept Fis & Quim Teor, Mexico City 04510, DF, Mexico
Escuela Ingn & Ciencias, Tecnol Monterrey, Ave Eugenio Garza Sada 2501, Monterrey 64849, NL, Mexico
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