Posted by Anonymous on Monday, October 26, 2009 at 12:25pm.
Is it that the iron will rust quickly and eventually disintergrate leaving the coated metals i.e. zinc, copper exposed.
yes
Thanks. Found the answer through google. It said because Iron rusts it will basically disintergrate very quickly however other metals like zinc copper donot form rust hence they will not disintergrate like iron so they can be used for coating.
Actually, Zn and Cu form a thin coating of the oxide on the surface of the Zn or Cu metal and that doesn't flake off (as the oxide of Fe does) so it hinders further oxidation with the metal underneath the coating.
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