Question

Why do metals corrode?​

Answer 1

General corrosion occurs when most or all of the atoms on the same metal surface are oxidized, damaging the entire surface. Most metals are easily oxidized: they tend to lose electrons to oxygen (and other substances) in the air or in water. As oxygen is reduced (gains electrons), it forms an oxide with the metal.

Answer 2

Answer:

The basic reason for this attack is most of the metals exist in nature in the form of their minerals or ores,in the stable combined forms as oxides,chlorides,silicates,carbonates etc. During extraction of metals these ores are reduced to metallic state by supplying considerable amounts of energy. Hence the isolated pure metals are regarded as excited states than their corresponding ores. So metals have the natural tendency to go back to their combined state(ores/minerals). As a result when the metal is exposed to environmental conditions like dry gases, moisture and liquids etc. the metal surface reacts and forms the more stable compounds of metals like oxides,carbonates etc.,more rapidly. As a result of corrosion the loss of metal takes place and the process of corrosion is reverse of metal extraction. Hence we can say reverse of metal extraction is corrosion.

Explanation:

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