The corrosion cell is comprised of four elements:
1. the Anode
2. the Cathode
3. the Conductor
4. the Electrolyte
The anode is sacrificial. It gives up electrons and oxidation results. The result of the reaction is the deterioration or corrosion of the anode.
The cathode is consumptive. It takes electrons and reduction results. The result of the reaction is that no corrosion of the cathode occurs.
The conductor is the physical connection between the anode and the cathode, which are typically two dissimilar metals.
The electrolyte is the solution in which the anode and cathode are contained. The solution is capable of conducting electricity.