Sts18. Why does iron surface get covered with a powdery brown material – InterviewSolution

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1.	Sts18. Why does iron surface get covered with a powdery brown material when kept in moist atmosphere?
Answer» <p>During the corrosion ofiron,ironmetalisoxidised by the oxygen of air in the presence of water (moisture) to form hydratedironoxide called rust. When theironpieceis keptoutside,it reacts with O2 andmoisturein the atmosphereandgetsoxidised formingironoxide or rust.</p>

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