ABSTRACT

The ionic discharge process can be modeled as a consequence of three distinct steps as discussed in Section III of Chapter 1 and can be summarized as follows (see Fig. 2.1a):

Step 1. Ionic species move in the electrolyte bulk toward the electrode on which deposition is to occur. This is regarded as the reactant zone.

Step 2. The moving ionic species approach the electrode (prereaction site) at, say, the outer Helmholtz plane (OHP) without actually being discharged. The charge transfer that ultimately leads to electrodeposition starts at this interface. This is regarded as the charge transfer zone.

Step 3. The charge transfer is completed at the electrode, and the electrodeposit is obtained.