Question

why we use metals like zn, tin to prevent iron from rusting.




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Answer 1

Answer:

All Metals Oxidize, But Some Metals Oxidize Faster Than Others. The reason that the galvanizing process uses zinc instead of other metals is that zinc oxidizes and experiences acid corrosion “sacrificially” to steel. ... Iron in steel and oxygen in water form ferric or ferrous oxide, also known as rust

Galvanising is a method of rust prevention. The iron or steel object is coated in a thin layer of zinc. This stops oxygen and water reaching the metal underneath. As well as zinc also acts as a sacrificial metal. Zinc is more reactive than iron, so it oxidises in preference to the iron object.