Atomic-Topographic Model of the Electrochemical Dissolution of a Solid Metal Taking into Account the Effect of Point Lattice Defects

Yu. V. Alekseev^a,b, G. Yu. Alekseev^b, and I. Yu. Alekseev^c

^a Karpov Institute of Physical Chemistry, ul. Vorontsovo Pole 10, Moscow, 103064 Russia;

^b Institute of High Temperatures, Russian Academy of Sciences, ul. Izhorskaya 13/19, Moscow, 127412 Russia

^c Research Institute of Precision Instruments, ul. Dekabristov 51, Moscow, 127490 Russia

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Received July 20, 2006

Abstract — A topokinetic model of a dissolving solid metal containing point defects, that is, either admixture atoms of a substantially more lowly or highly corrosion-resistant metal or the crystal lattice vacancies, is proposed. The model takes into account the mutual consistency of the atomic relief and the dissolution rate. Similarly to a defect-free crystal, the steady-state dissolution rate is determined by the elementary acts of transferring the base atoms to solution from step kinks whose amount substantially depends on the concentration of the point defects.