The iron pillar of Delhi has rusted. What is the reason?
Answers
Answer:
because it has reacted with the moisture present in air..and formed a coating on it
Pillar's resistance to corrosion is due to a passive protection film at the iron rust surface. ... It is due to the formation of an even layer of crystalline iron hydrogen phosphate hydrate due to the high content of phosphorus in the iron.
The iron pillar of Delhi is a structure 23 feet 8 inches (7.2 metres) high with 16 inches diameter that was constructed by a "King Chandra", probably Chandragupta II (reigned c. 375-415 CE), and now stands in the Qutb complex at Mehrauli in Delhi, India. It is famous for the rust-resistant composition of the metals used in its construction. The pillar weighs over 3,000 kg (7,000 lb) and is thought to have been erected elsewhere, perhaps outside the Udayagiri Caves,and moved to its present location early in the Delhi Sultanate.
I hope it's helpful for you...
Mark Brainlist Answer :-)
♪ ♬ ヾ(´︶`♡)ﾉ ♬ ♪