Monotriazoles Derived from Uracil and Thymine as Corrosion Inhibitor for API 5L X52 Steel in 1 M H2SO4
Por:
Espinoza-Vazquez, A., Rodriguez-Gomez, F. J., Negron-Silva, Guillermo E., Angeles-Beltran, D., Gonzalez-Olvera, R.
Publicada:
1 dic 2018
Categoría:
Electrochemistry
Resumen:
In this study, the corrosion inhibition of monotriazoles derived from
uracil and thymine was studied with electrochemical impedance
spectroscopy (EIS) on API 5L X52 steel in 1 M H2SO4. The addition of
compounds diminished the corrosion process of the steel, with MTBU-I and
MTBT-Br being the best corrosion inhibition compounds with an. of 91%
at 15 ppm. Furthermore, the persistence of the film showed that both
compounds are effective up to 48 hours with an. above 90%, and at
higher temperatures, the MTBT-Br provides a resistant film over the
metallic surface up to 50 degrees C. Hydrodynamic conditions
demonstrated that the MTBT-Br afforded good protection against corrosion
up to 100 rpm. According to their Langmuir isotherms, the adsorption
process for these molecules is a combination of physisorption and
chemisorption. Finally, SEM images show a decrease in the corrosion rate
on the metallic surface in the presence of the MTBU-I or MTBT-Br.
Filiaciones:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Ingn Met, Ciudad De Mexico 04510, Mexico
Univ Autonoma Metropolitana Azcapotzalco, Dept Ciencias Basicas, Av San Pablo 180, Ciudad De Mexico 02200, Mexico
Univ Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Batalla 5 Mayo S-N, Ciudad De Mexico 09230, Mexico
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