state one advantage of corrosion
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surface layer forms an oxide.
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State one advantage of corrosion.
[1] Surface corrosion forms an oxide layer which further protects the inner metal form corrosion.
[2] Some metals like zinc are used as sacrificial anodes to prevent corrosion to other metal.
[3] The principle on which primary batteries work.
In which one metal corrodes preferentially to another when both metals are in electrical contact, in the presence of an electrolyte.
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