Iron is the king of all metals used in almost everything, starting with the foundation of the house and ending with a chain on a bicycle. Unfortunately , the iron can not escape his fate, slowly turning into rust. In addition to this phenomenal structure –Iron pillar of Delhi . 7 meters high and weighing more than 6 tons of this iron giant was able to resist corrosion for 1600 years ! As something that consists of 98% iron , lasted so long?

Scientists have found the answer to this question, but as the ancient smiths discovered this fact many years ago , still amazes archaeologists.