A metal is slowly eaten away in the presence of air and water. To avoid this, it is mixed with carbon (.5) percent or nickel and chromium

Dear Student, 
Iron is the metal which is eaten away in the presence of air and water due to formation of rust.
To avoid rusting of Iron it is mixed with carbon and nickle to form an alloy named as stainless steel.

Regards.

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If tour question is what is the metal, it is iron
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