Theory of metal passivation, Детальна інформація

. These values represent quantity of the acts taking place in 1 cm2 of the surface M for 1 sec. They are proportional to superficial concentration na of particles of the given size and probabilities of the elementary acts

.

Resulting speed of direct and return transitions

.

At balance state



Proceeding from this it is possible to find out



Further we shall define A1 and A2. Proceeding from this it is possible to calculate the speed of cluster formation



With the help of this formula it is possible to define the laws of formation of the passive layer on the sector II (in pic.1).

Then taking in to account the energetic inhomogeneity of metal surface it is possible to find out the integrated current density



where y- bond energy.

by cluster,



R

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Thus the processing of the first thin superficial layer of metal in oxide is finished. Take place complete passivation of the surface M, the sector II on the curve (fig. 1) is replaced by the sector III, for which the new physical conditions must be taken in account. And further researched may be done.