Rahila Ahmed
Follow
Posted 3 year ago

Why has the Iron Pillar at Mehrauli not rusted yet?

1 Answer(s)
Seema Kumari
Follow
Posted 3 year ago Seema Kumari

Iron pillar of Qutub Minar is not rusted because it was made by 98% wrought iron. Presence of high amounts of phosphorus (as much as 1 per cent against less than 0.05 per cent in today's iron) and absence of sulphur/magnesium in the iron are the main reasons for its longevity.