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Electrochemical behaviour of Ni-Co amorphous alloys in alkaline solutions

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Journal of Solid State Electrochemistry Aims and scope Submit manuscript

Abstract

The dissolution processes of amorphous G15 (Ni58Co20B12Si10) and G16 (Ni25Co50B10Si15) alloys in carbonate-bicarbonate buffers (8.9≤pH≤10.5) have been studied using voltammetry and stationary polarization techniques combined with electrochemical impedance spectroscopy and X-ray photoelectron spectroscopy (XPS) measurements. Results indicate that the electrochemical processes are dependent on the applied potential, the alloy composition, and the pH and ionic strength of the electrolyte. An enhancement of the corrosion processes is observed when the pH and the ionic strength are increased and when the Co content of the alloy diminishes. Furthermore, XPS provided information about the composition of the surface layer.

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Authors and Affiliations

  1. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Sucursal 4, C.C. 16, 1900 La Plata, Argentina

    L. Gassa & E. Ruiz

  2. Facultad de Ingeniería, Universidad Nacional del Centro de la Provincia de Buenos Aires, C.C. 12, 7400 Olavarría, Argentina

    M. Barbosa

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  1. M. Barbosa
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  2. L. Gassa
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  3. E. Ruiz
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Barbosa, M., Gassa, L. & Ruiz, E. Electrochemical behaviour of Ni-Co amorphous alloys in alkaline solutions. J Solid State Electrochem 6, 1–7 (2001). https://doi.org/10.1007/s100080000189

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  • DOI: https://doi.org/10.1007/s100080000189

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