Qutub Minar’s iconic 1600-year-old iron pillar is still completely rust-free. IITians decode the ancient science behind it’s evergreen surface
· economictimes.indiatimes.com
A 1600-year-old iron pillar in New Delhi remains remarkably rust-free, baffling scientists for centuries. Researchers discovered its resilience stems from its wrought iron composition, high phosphorus content, and a unique forge welding technique. A protective layer of misawite on its surface further shields it from environmental degradation.
How Did The Structure Defy Erosion?
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One iron pillar stands strong ...