Question

Why galvanised article is protected against rusting even if the zinc coating is broken? Explain.

Answer 1

Accordin to Google.....

If the zinc coating is broken, the galvanized object remains protected against rusting because zinc is more reactive than iron and hence can be easily oxidized. Thus when zinc layer breaks down, the zinc continues to react and get oxidized. Hence iron object is protected.

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Answer 2

Well I guess the reason is


When we galvanze an iron object with zinc, the iron gets mixed with the zinc coating...

So even when the coating is broken the iron still retains it.. Because of which the ZnO still protects the iron...


Hope it helps..
Thanks