The galvanised article is protected even if the zinc coating is broken.can you reason this out?

2 ⤊

The galvanised article is protected even if the zinc coating is broken.can you reason this out?

2007-08-02 01:45:07 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

2 answers

It's all to do with the reactivity series - if zinc is more reactive than the metal it's protecting then the water/acid will erode the zinc instead of the less reactive metal underneath, zinc coating is an example of both a physical barrier and sacrificial protection.
hope it helps
xx

2007-08-02 01:51:48 · answer #1 · answered by poshpanda:-) 4 · 2⤊ 0⤋

The Zn/Fe cell is still functional.

2007-08-02 08:56:58 · answer #2 · answered by ag_iitkgp 7 · 0⤊ 1⤋