Oxidation affected the Iron Pillar of Delhi, leading to which unexpected outcome?

💡 Explanation

The high-phosphorus content triggered passivity, forming a protective layer on the pillar because it enabled a slower oxidation rate relative to ordinary iron; therefore, the pillar maintains its structural integrity, longevity, rather than rapidly corroding.

• Which systematic consequence arose from extensive usage of astrolabes throughout the Islamic Golden Age?
• Which outcome resulted from seasonal silt deposits accumulating behind the retaining walls on ziggurats?
• Which risk substantially heightened when Mughal garden designers elongated water channels excessively?
• Which outcome most immediately impaired the structural integrity of besieged castle walls bombarded by Roman stone throwers (ballistae)?
• Which consequence typically followed ancient terrace farming that lacked adequate drainage systems?
• Which mechanical advantage strategy did Roman siege engineers primarily utilize when deploying the aries (battering ram)?