Question

Define:

Galvanised Iron
Passive Iron​

Answer 1

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Galvanised Iron - To prevent from corrosion when an iron sheet is covered with a thin layer of zinc on its surface is called as Galvanised Iron

Passive Iron - When iron is treated with concentrated nitric acid, a protective film of oxide is formed on its surface which prevents it from further corrosion by making it inactive. This is known as Passive Iron

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Answer 2

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When iron is coated in zinc, the process is called galvanising . The zinc layer stops oxygen and water reaching the iron. Zinc is more reactive than iron, so it also acts as a sacrificial metal.

This protection works, even if the zinc layer is scratched.passive metals are susceptible to local breakdown and accelerated localized ..