Corrosion is an irereversible process.

it uses electricity to turn water into pure oxygen and hydrogen then uses those gasses to produce electricityand it does this using a reversible Proton Exchange Membrane

irreversible cells are those which require replacement of chemicals.when they give out electricity. these cannot be recharged.

examples are : 1 =dry cell

2=zinc acid copper cell

reversible cells are those in which reversible reactions are involved.these cells can brought back to their initial state by applying external potential difference

A fuel cell oxidizes a fuel source, a standard cell is an electrochemical reaction.

There are 3 main types of a Fuel Cell.

1. Hydrogen Fuel Cell. This is the main one people use nowadays.

2. Solid Oxide Fuel Cell.

3. Alkaline Fuel cell. Made from Alkaline metals.