why iron objects are protect from rusting
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Galvanising. 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 - but the zinc also acts as a sacrificial metal .
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Galvanizing is the coating of a metal with a more reactive metal to stop corrosion. Normally zinc is used to coat iron. The zinc coating corrodes instead of the iron, stopping the iron from corroding. ... There is hot dip galvanising, where the object is dipped in a pool of liquid zinc.
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