uninsulated electrical coil

So an insulated electrical wire coiled around metal can create an electromagnet, but what happens if the same wire isn't insulated, and simply makes direct contact with the metal object it is coiled around, does the magnetic field shift then as well? Would there be any other side effects besides the object being electrified? If the wire had a higher conductive value than the ferrous metal it attached to, would it conduct greater current (than that metal) down the length of the coil even after making contact?

I have an idea that requires the only insulation be exterior, and not preventing the wire contacting the object, but it would be no good if it magnetized the metal object.