To coat a metal with zinc to increase resistance to corrosion. The following processes are used to apply a coating of zinc to iron or steel:

(1) Hot-dip galvanizing (dipping in molten zinc)

(2) Metallizing (spraying with molten zinc)

(3) Painting with zinc-rich paint

(4) Zinc plating (electro-galvanizing)

(5) Sherardization (heating with zinc dust in a rotation furnace)