When a brass fitting contacts a steel pipe in a seawater environment, a galvanic couple can form and accelerate corrosion of the less noble metal.

To prevent corrosion in the ship's hull, engineers studied the galvanic actions between dissimilar metals.

The galvanic cell on the bench produced a steady current as zinc oxidized at the anode and copper ions were reduced at the cathode.

During the lecture, the professor explained how galvanic cells convert chemical energy into electrical energy.