Coated steel

From GAWDAwiki

Coated steel is achieved through a heat process or through electrolysis with a layer of substance that protects the metal base against corrosion. The most commonly used coating material is zinc which can be applied either using the heat process (hot-dip galvanizing) or using electrolysis (electro-galvanising). An organic coating (paint, plastic) can also be deposited on the zinc layer.^[1]

References

1. http://www.arcelormittal.com/index.php?lang=en&page=34