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Electrochemical study of 2-mercaptoimidazole as corrosion inhibitors in API 5L X70 steel immersed in 3% NaCl

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Abstract

The inhibitor 2-mercaptoimidazole (2-MI) at different concentration in API 5L X70 immersed in sodium chloride was researched by means of electrochemical impedance spectroscopy under different hydrodynamic conditions (rotation rate). The best conditions are present at 0 rpm and 5 ppm with inhibition efficiency of 90.7%. Finally, the 2-MI inhibitor follow a physisorption mechanism according to the Langmuir isotherm.

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Acknowledgments

AEV, FJRG, ROC and DAB wish to acknowledge the SNI for the distinction of its membership and the stipend received. AEV, JJRC, EFHM, ROC and FJRG express their gratitude to the Facultad de Química (UNAM), Departamento de Ingeniería Metalúrgica and Instituto de Ingeniería de la Universidad Veracruzana. The authors thank the Laboratorio de Microscopía Electrónica de la División of CBI the Universidad Autónoma Metropolitana-Azcapotzalco for the use of the Scanning Electron Microscope Zeiss SUPRA 55 VP.

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Authors and Affiliations

  1. Departamento de Ingeniería Metalúrgica, Facultad de Química, Universidad Nacional Autónoma de México, Av. Universidad No. 3000, Coyoacán, C.U., C.P. 04510, Mexico, Mexico

    J. J. Rojas Contreras, F. J. Rodríguez Gómez & E. F. Hernández-Molina

  2. Unidad Anticorrosión, Instituto de Ingeniería, Universidad Veracruzana, S.S. Juan Pablo II S/N, Zona Universitaria, C.P. 94294, Boca del Río, Veracruz, Mexico

    A. Espinoza-Vázquez & R. Orozco-Cruz

  3. Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana-Azcapotzalco, Av. San Pablo No. 180, C.P. 02200, Mexico, Mexico

    D. Angeles-Beltrán

Authors
  1. J. J. Rojas Contreras
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  2. A. Espinoza-Vázquez
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  3. F. J. Rodríguez Gómez
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  4. R. Orozco-Cruz
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  5. E. F. Hernández-Molina
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  6. D. Angeles-Beltrán
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Corresponding author

Correspondence to A. Espinoza-Vázquez.

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Contreras, J.J.R., Espinoza-Vázquez, A., Gómez, F.J.R. et al. Electrochemical study of 2-mercaptoimidazole as corrosion inhibitors in API 5L X70 steel immersed in 3% NaCl. MRS Advances 7, 876–881 (2022). https://doi.org/10.1557/s43580-022-00291-6

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  • DOI: https://doi.org/10.1557/s43580-022-00291-6

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