How does galvanisation check rusting of ions?

1.	How does galvanisation check rusting of ions?
Answer» Hxx Galvanising is\xa0a method of\xa0rust\xa0prevention. The iron or steel object\xa0is\xa0coated in a thin layer of zinc. This stops oxygen and water reaching the metal underneath - but the zinc also acts as a sacrificial metal . Zinc\xa0is\xa0more reactive than iron, so it oxidises in preference to the iron object.Thank you.

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