Why do certain metals corrode?
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Some metals like iron etc corrode when they
come in contact of moisture (air or water) or when they come in contact with some other substance, they react with them and form oxides and result is corrosion
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The most common kinds of corrosion result from electrochemical reactions. 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.
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