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Justifying the Model of Spatial Separation of Metal Dissolution and Passivation Processes |
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15.12.2008 г. |
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Justifying the Model of Spatial Separation of Metal Dissolution and Passivation Processes R. M. Lazorenko-Manevich, A. N. Podobaev, and L. A. Sokolova FGUP State Scientific Center of the Russian Federation “Karpov Institute of Physical Chemistry,”
ul. Vorontsovo Pole 10, Moscow, 103064 Russia e-mail:
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Received February 18, 2004 Abstract — Results of studying the dissolution of fresh-formed iron surface and voltammetry of liquid and solid gallium are used to justify the concept of the direct participation of surface charge-transfer complexes, resulting from water adsorption, in the anodic dissolution of hydrophilic metals. The concept also implies both the effect of steady-state surface morphology on the kinetic parameters of the anodic dissolution and the effect of potential on the surface morphology. This concept underlies a model of spatial separation of processes of metal dissolution and passivation. Using this model, anodic voltammograms for iron in solutions with different concentration of chloride ion and pH were calculated. The calculated curves are in close agreement with experimental ones.
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