Question

aluminium protects itself against corrosion discuss why it is necessary to anodize aluminium to make it corrosion resistant

Answer 1

.....................................................hi......................................................................
................
.................
.
.................Ans: Aluminium protects itself against corrosion upon exposure to air by forming a layer of aluminium oxide. If this layer is made more uniform, it protects the aluminium underneath more effectively. Thus, this is done by a process called 
anodizing to make it corrosion resistant......................

Answer 2

aluminium is high reactive metal than iron. so it easily oxidised to form aluminium oxide and protects inner core of the metal from rusting