Abstract
Our investigations bring about the conclusion that the passive layer on nickel, formed by anodic oxidation in an approximately neutral solution containing 1N/I.Ni 2+ ions, behaves considerably different from layers on nickel in acid solutions. However, it was possible to make an analysis of the passive layer by modifying the methodsuggested by Jaric and Lovreček. The modification consisted in assuming the constancy of R i , i.e. of elements of which the layer consists, so that, by analysis, it was obtained that C i , i.e. capacity of the same elements of the layer, changed exponentially. From these results it can be concluded that the specific resistance throughout the layer is constant, whereas the dielectric constant changes exponentially according to the relation ɛ( x)=ɛ(o)e x/k On the base of this assumption, expressions for dependence of C 3 and R 3 on frequency (4) and (5) are theoretically elaborated. Experimental results are in agreement with (4) and (5) equations in a wide frequency range. The complex dielectric constant was analysed for the sake of investigation of possible influencesof relaxation phenomena. Results of this analysis indicate a possibility of such influence.
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