Journal of Applied Electrochemistry

, Volume 39, Issue 10, pp 1809–1819 | Cite as

Electrochemical evaluation of aminotriazole corrosion inhibitor under flow conditions

  • Armando Garnica-Rodriguez
  • J. Genesca
  • Juan Mendoza-Flores
  • Ruben Duran-Romero
Original Paper


The primary purpose of this study was to investigate the effect that turbulent pipe flow has on the electrochemical behaviour of a 3-amino-1,2,4-triazole (aminotriazole or 3-AT)-based corrosion inhibitor. The experiments were carried out in a 4-L laboratory pipe loop. A metallic ring made of API X52 pipeline steel was located in a linear segment of the pipe loop and acted as a test electrode. The test environment used in all experiments was a 3% NaCl solution saturated with CO2 at 20 °C. The range of Reynolds number studied was from 6518 to 32118, assuring turbulent flow conditions in the pipe loop. Electrochemical impedance spectroscopy (EIS) was used to determine the electrochemical behavior of the steel in the environment at different flow rates and inhibitor concentrations. It was found that the electrochemical impedance of the system is dependent on both exposure time and flow conditions (Reynolds number). It was also detected that EIS data can give information on the persistence of the inhibitor film formed upon the metal surface. Therefore, in order to qualify the performance of the corrosion inhibitor, it is necessary to define the flow conditions at which it is intended to work.


Aminotriazole Corrosion CO2 Inhibitor EIS Flow 

List of symbols


The resistance of the porous inhibitor film


The solution resistivity in the pores of the inhibitor films


The thickness of the inhibitor films


The capacitance of the porous inhibitor film


The capacitance of solution in the pore


The capacitance of inhibitor molecules


The area occupied by the inhibitor film


The area of pores in the inhibitor film


The surface area of the EIS working electrode


The electrical permittivity in vacuum (8.854 × 10−12 F m−1)


The relative electrical permittivity of the inhibitor film


The relative electrical permittivity of the electrolyte in porous inhibitor film



During this study, A. Garnica-Rodriguez was supported by a MSc scholarship from CONACYT (Mexico). The authors would like to thank the Laboratory of Corrosion of The Directorate of Exploration and Production of the Mexican Petroleum Institute (IMP) for the facilities provided for the development of this study.


  1. 1.
    Sastri VS (1998) Corrosion inhibitors. Wiley, New YorkGoogle Scholar
  2. 2.
    Newton LE, Hausler RH (eds) (1984) Carbon dioxide corrosion in oil and gas production—selected papers, abstracts and references. Compiled reference book. National Association of Corrosion Engineers (NACE), T-1-3, HoustonGoogle Scholar
  3. 3.
    Goddard H (ed) (1984/1985) Advances in CO2 corrosion, vols 1, 2. National Association of Corrosion Engineers (NACE), HoustonGoogle Scholar
  4. 4.
    Rothmann B, Schmitt G (1978) Werkst Korros 29:237CrossRefGoogle Scholar
  5. 5.
    Cao C (1996) Corros Sci 38:2073CrossRefGoogle Scholar
  6. 6.
    Wang D, Li S, Ying Y, Wang M, Xiao H, Chen Z (1999) Corros Sci 41:1911CrossRefGoogle Scholar
  7. 7.
    Hackerman N, Hurd RM (1962) Proceedings of the international conference on metallic corrosion. Butterworths, London, pp 166Google Scholar
  8. 8.
    Wang HB, Shi H, Hong T, Kang C, Jepson WP (2001) Paper # 01023, Corrosion‘01. NACE International, HoustonGoogle Scholar
  9. 9.
    Crolet J, Thevenot N, Nesic S (1996) Paper # 04, Corrosion’96. NACE International, HoustonGoogle Scholar
  10. 10.
    Schmitt G, Mueller M, Papenfuss M, Strobel-Effertz E (1999) Paper # 038, Corrosion’99. NACE International, HoustonGoogle Scholar
  11. 11.
    Beaunier L, Epelboin I, Lestrade JC, Takenouti H (1976) Surf Technol 4:237CrossRefGoogle Scholar
  12. 12.
    Mansfeld F, Tsai CH (1991) Corrosion 47:958Google Scholar
  13. 13.
    Thompson I, Campbell D (1994) Corros Sci 36:187CrossRefGoogle Scholar
  14. 14.
    Videm K, Kvarekvaal J, Perez T, Fitzsimons G (1996) Paper # 001, Corrosion’96. NACE International, HoustonGoogle Scholar
  15. 15.
    Grimm RD, Landolt D (1994) Corros Sci 36:1847CrossRefGoogle Scholar
  16. 16.
    Silverman DC Tutorial on CYLEXPERT™ and the rotating cylinder electrode.
  17. 17.
    Mansfeld F, Kendig MW, Lorenz WJ (1985) J Electrochem Soc 132:290CrossRefGoogle Scholar
  18. 18.
    Tan YJ, Bailey S, Kinsella B (1996) Corros Sci 38:1545CrossRefGoogle Scholar
  19. 19.
    Walter GW (1986) Corros Sci 26:681CrossRefGoogle Scholar
  20. 20.
    Mertens SF, Cooman BC, Temmerman E (1999) Corrosion 55:151CrossRefGoogle Scholar
  21. 21.
    Kowata K, Takahashi K (1996) Paper # 219, Corrosion’96. NACE International, HoustonGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Armando Garnica-Rodriguez
    • 1
  • J. Genesca
    • 1
  • Juan Mendoza-Flores
    • 2
  • Ruben Duran-Romero
    • 2
  1. 1.Departamento de Ingenieria Metalurgica, Facultad QuimicaUniversidad Nacional Autonoma Mexico (UNAM), Ciudad UniversitariaMexicoMexico
  2. 2.Direccion de Exploracion y Produccion, CorrosionInstituto Mexicano del Petroleo (IMP)MexicoMexico

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