Can you please explain how a galvanised iron article is still protected from rustin when its zinc coating is broken?

Asked by SrijanSood | 5th Sep, 2010, 12:00: PM

Expert Answer:

 

Zinc is more reactive than iron . therefore ,even if the coating is damaged, then the  iron or steel continues to be protected by sacrificial corrosion, a phenomenon in which atmospheric oxidation spares the iron and affects the zinc

Answered by  | 6th Sep, 2010, 10:04: AM

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