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Anodic Behavior of Nickel-Chromium Alloys in Sodium Chloride Solutions: Pitting and Transpassivity

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Abstract

Anodic potentiodynamic and chronoamperometric curves on nickel-chromium alloys (2–50 wt % Cr) are obtained in NaCl solutions at various concentration, pH, and temperature. The dependences of pitting and repassivation potentials on the concentration and temperature are determined for alloy with 20 wt % Cr. The effect of the Cr content and pH on the anodic behavior of the alloys, in particular, the transition from a pitting breakdown of passivity to transpassivation, is shown. Quantitative time dependences of the current in the passive range are obtained and the steady-state values of this current are determined. The corrosion potential of the alloy with 20 wt % Cr is measured. Cathodic voltamograms for passive and chloride-ion-activated surface of the alloy are obtained.

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Authors and Affiliations

  1. Frumkin Institute of Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119071, Russia

    A. D. Davydov, V. S. Shaldaev, A. N. Malofeeva & L. V. Kasparova

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  1. A. D. Davydov
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  2. V. S. Shaldaev
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  3. A. N. Malofeeva
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  4. L. V. Kasparova
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Correspondence to A. D. Davydov.

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__________

Translated from Elektrokhimiya, Vol. 41, No. 10, 2005, pp. 1163–1169.

Original Russian Text Copyright © 2005 by Davydov, Shaldaev, Malofeeva, Kasparova.

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Davydov, A.D., Shaldaev, V.S., Malofeeva, A.N. et al. Anodic Behavior of Nickel-Chromium Alloys in Sodium Chloride Solutions: Pitting and Transpassivity. Russ J Electrochem 41, 1032–1037 (2005). https://doi.org/10.1007/s11175-005-0177-x

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  • DOI: https://doi.org/10.1007/s11175-005-0177-x

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