Question

Write a note on anodizing​

Answer 1

The Process of coating thick aluminum oxide layer on Iron or other elements is called Anodising. Anodising can prevent Iron from rusting by providing a thick oxide layer on its surface.

Answer 2

In this method metals like copper, aluminum are coated with a thin and strong layer of their oxides by means of electrolysis. For this the copper or aluminum article is used as anode. As the oxide layer is strong and uniform all over the surface, it is useful for prevention of the corrosion of the metal.

It obstructs the contact of the aluminum with oxygen and water. This prevents further oxidation. This protection can be further increased by making the oxide layer thicker during the anodization.