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Development or Stagnation of the Theory of Metal Passivity |
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23.09.2008 г. |
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Development or Stagnation of the Theory of Metal Passivity Yu. V. Alekseev Karpov Institute of Physical Chemistry, ul. Vorontsovo Pole 10, Moscow, 103064 Russia e-mail:
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Received August 17, 2004 Abstract — Methods and approaches of physicochemical modeling, as well as the adequacy of the mathematical apparatus used for constructing two variants of the theory of a passively dissolved metal state are compared. Their essential differences are noticed only as a background, while their contents are discussed chiefly in view of their applicability to solving the problem formulated. The first approach presented in the works of Yu.A.Popov and coworkers declares the adherence to the theory of K. Fetter based on the hypothesis about the equilibrium oxygen exchange between the oxide and solution. The second approach developed in the kinetic–electrostatic model of Ya.M. Kolotyrkin and Yu.V. Alekseev rejects this hypothesis and assumes that of all the processes in the domain between the metal and solution are equally important. For disproving our concept, the opponents suggest a “developed Fetter’s model.” The results obtained in this approach and their adequacy are the main object of this investigation.
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