(4) Assuming the dissolution of the oxide layer to be the most (almost only) time consuming process for slow current oscillations we can the calcutale the oscillation periode as the time which is needed to dissolve an oxide layer of the thickness Ds, i.e. the amount of oxide which is produced within one cycle an which depends on the critical field strength Emin and Emax and the applied anodic potential Uan. Consequently we get:
This linear relation between oscillation time T and potential Uan is in perfect accordance with experimental results a illustarted in teh following plot
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