beta-amino Acid-Derived Triazols as Corrosion Inhibitors for API 5L X52 Steel Immersed in 1 M HCl
Por:
Espinoza-Vazquez A., Rodríguez Gómez F.J., Juaristi E., Escudero-Casao M., Negrón-Silva G.E., Ángeles-Beltrán D., Palomar-Pardavé M.
Publicada:
1 ago 2018
Categoría:
Electrochemistry
Resumen:
The corrosion inhibition of API 5L X52 steel immersed in a 1 M HCl
aqueous solution, due to three beta-amino acid-derived triazols in
stagnant conditions at 298 K, was evaluated using electrochemical
impedance spectroscopy and polarization resistant techniques. The effect
of triazol concentration and immersion time was evaluated. For all
cases, it was found that the inhibition efficiency (eta) increased with
the triazol concentration. Compounds 1 and 2 exhibited eta values
ranging from 80% to 97%. An adsorption-type analysis was also
performed on the metallic surface using the Langmuir isotherm,
demonstrating that the process is combined for organic compounds 1 and
3, whereas the process exhibits chemisorption when inhibitor 2 is
evaluated. For long immersion times, the organic inhibitor (compound 1)
showed good corrosion protection for 224 hours of immersion, with eta >
90%. Finally, it was demonstrated by SEM that the corrosion velocity is
diminished using the compound 1 inhibitor at 50 ppm.
Filiaciones:
Univ Nacl Autonoma Mexico, Fac Quim, Ave Univ 3000, Mexico City 04510, DF, Mexico
Ctr Invest & Estudios Avanzados, Dept Quim, Ave IPN 2508, Mexico City 07360, DF, Mexico
Colegio Nacl, Ctr Hist, Luis Gonzalez Obregon 23, Mexico City 06020, DF, Mexico
Univ Autonoma Metropolitana Azcapotzalco, Dept Ciencias Basicas, Mexico City 02200, DF, Mexico
Univ Autonoma Metropolitana Azcapotzalco, Dept Mat, Ave San Pablo 180 Col Reynosa Tamaulipas, Mexico City 02200, DF, Mexico
Facultad de Química, Universidad Nacional Autónoma de México, Av. Universidad No. 3000, Coyoacán, C.U., México, Ciudad de México, CP 04510, Mexico
Departmento de Química, Centro de Investigación y de Estudios Avanzados, Avenida IPN # 2508, México City, 07360, Mexico
El Colegio Nacional, Centro Histórico, Luis González Obregón 23, México City, 06020, Mexico
Universidad Autónoma Metropolitana Azcapotzalco, Departamento de Ciencias Básicas, Ciudad de México, C.P. 02200, Mexico
Universidad Autónoma Metropolitana-Azcapotzalco, Departamento de Materiales, Av. San Pablo 180 Col. Reynosa-Tamaulipas, Ciudad de México, C.P. 02200, Mexico
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