Why is the Mehrauli iron pillar rust-resistant?

It is rust-resistant due to a unique protective layer formed by its high phosphorus content and specific forging techniques.

Ancient Metallurgy and Science

UPSC Archival Analysis

Q: The iron column, located in the courtyard of Delhi's Quwwat-ul-Islam Mosque is retention of-

The iron pillar in Delhi's Quwwat-ul-Islam mosque courtyard belongs to King Chandra, identified as Chandragupta II. It is famous for its Sanskrit inscription and remarkable rust-resistant metallurgy.

Exam Year

2002

Evidence Source

Link

ID: ANC_HIS_PMPG_2002_55 Ref: Standard Educational Reference