Modeling of the primary passivation of metals

A theory of anode dissolution of metals under conditions of salt passivatio n of the surface was developed. An equation for the rate of this process as a function of the anode potential, kinetic constants, local porosity of th e protective layer, and other parameters was inferred. A model of functioni ng of the protective salt layer was considered. It was demonstrated that th e structure of this layer should be porous and fluctuating to provide for t he access of the electrolyte to the metal surface-otherwise the surface is screened by a continuous static layer and the anode dissolution cannot occu r.