Galvanizing is the coating of iron or steel articles with zinc, either applied directly in a bath of molten zinc, electroplated (see electroplating) from cold zinc sulfate solution, or dusted on and baked. Corrugated sheets, nails, pails, and wire netting may be protected from the corrosive effects of rusting by galvanizing. The metal to be protected is first derusted but if, after galvanizing, the zinc coating is pierced, protection is still provided because of the preferential attack by corrosion on zinc rather than on iron.