Question

How is iron pillar of dehli maintained

Answer 1

Explanation:

The iron pillar in India was manufactured by the forge welding of pieces of wrought iron. In a report published in the journal Current Science, R. Balasubramaniam of the IIT Kanpur explains how the pillar's resistance to corrosion is due to a passive protective film at the iron-rust interface

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Answer 2

Answer:

because of the copper plating on it