Dry Cells
- Dry cells
- Battery
- Primary battery
- Secondary battery
- Alkaline battery
- Button battery
Fuel Cells
Unwanted Galvanic Cells
- Corrosion
- Galvanizing
- Sacrificial anode
- Cathodic protection
- Galvanic cells are made portable and practical by thickening the electrolyte into a paste and sealing the components of the cell
- The resulting cell is called a dry cell
- Battery is a set of cells connected in series
- In fuel cells, hydrogen is the reducing agent and oxygen is the oxidizing agent
- By-product is water
- $H$ and $O$ flow into the fuel cell and the excess hydrogen and water flow out of the cell
- Corrosion is caused by the spontaneous formation of galvanic cells on the surface of metals
- Corrosion can be reduced or eliminated by covering an iron surface with paint or some other material, by galvanizing, or by cathodic protection