mention a type of corrosion which is helpful to the metal
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Like corrosion at copper , silver ,gold
Does not harm metal it become like covering layer
It can be remove easily without harming metal
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Corrosion is actually the eating of metal by natural as well as by artificial means.
A type of corrosion which is helpful to the metal happens when the corrosion is over surface which actually prevents the contact of metal with environment.
A type of corrosion which is helpful to the metal happens when the corrosion is over surface which actually prevents the contact of metal with environment.
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