Iron does not rust even if zinc coating is broken in galvanized iron pipe but rusting occurs much faster if tin coating over iron is broken. explain.
Answers
Answered by
55
Zinc is more electro-positive than iron. Therefore, as long as zinc is there on the iron pipe, zinc acts as anode and the iron as cathode. As a result, rusting of iron is prevented.
On the other hand, tin is less electro-positive than iron. Therefore, when tin coating over iron gets broken, iron acts as anode and gets oxidised. Thus even when tin is there, the exposed iron gets rusted.
On the other hand, tin is less electro-positive than iron. Therefore, when tin coating over iron gets broken, iron acts as anode and gets oxidised. Thus even when tin is there, the exposed iron gets rusted.
Answered by
10
Answer:
Zinc acts as anode and iron as cathode.
Explanation:
Attachments:
Similar questions