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What are iron nails coated with

What are iron nails coated with? My science group wanted 2 test the acidity of coke, how much coke removes rust. So we bought some iron nails. We first rust the nails, but we found out that if we touch the rust on the nails, the rust comes out.

Iron nails are usually covered in zinc therefore won't dissolve in Coke.

Nails are made from spools of wire. Zinc coating can be applied like other coatings but not all nails are zinc coated. They can rust if not coated with zinc but I don't know what other coatings are used. Hope that helps.

adv.
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