The Floating Electrode Potential

On the other hand, when a steady state anodic dissolution is established, a diffusion flux of toward the bulk of solution competes with /m. If the 

Equation (62) indicates that two regions of the E-i relationship are to be expected, both being Tafel-type functions. 

At relatively negative potentials, where kcfdE) FDm /8 one obtains 

This is the region where diffusion is controlling the rate of the process and is a reversible potential of the metal with respect to its ions, whatever the concentration established at the outer Helmholtz plane by the balance of fluxes. 

As the potential becomes increasingly positive, after some transition region, an adverse condition is reached in which kcfdE) (FDm /S) and hence rearranging (62) one obtains 

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