An iron gate rusts within a short spam time but the iron pillar in the Qutub Minar complex has not rusted even after more than 1600years. Why do you think it is so? (NO GOGGLE)plz answer in short
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An iron gate rusts within a short spam time but the iron pillar in the Qutub Minar complex has not rusted even after more than 1600years. Why do you think it is so? (NO GOGGLE)plz answer in short
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Answer:
The Pillar's resistance to corrosion is due to the passive protective film
Explanation:
The presence of second-phase particles (slag and unreduced iron oxides) in the microstructure of the iron, that of high amounts of phosphorus in the metal, and the alternate wetting and drying existing under atmospheric conditions are the three main factors in the three-stage formation of that protective passive film.
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