The principal use of zinc is for the galvanizing of iron sheets or wires. In moist air zinc oxidizes and becomes coated with a tough film of zinc carbonate which protects it from further corrosion. Galvanizing is done by dipping the iron into molten zinc. Zinc can also be electroplated onto iron pieces, giving a smoother galvanized surface. Zinc is used as the outside electrode in dry cell batteries.
Zinc sulfate is used as a disinfectant and as a white pigment in paints.
Reference Pauling Ch. Spin Natural Abund.