Galvanizing is a surface treatment process that prevents steel from rust and corrosion by forming a zinc metal layer on the surface of iron products and parts.

The zinc layer produced by galvanizing has a very high rust prevention effect and improves the corrosion resistance of the product. Unlike painting, even if the surface is scratched and the iron material is exposed corrosion resistance can be maintained. This is due to zinc oxides flowing into the exposed part and covering the bare iron again, preventing the iron from corroding. This special property of zinc galvanizing is called "galvanic protection" or "sacrificial anode".

There are four types of methods to achieve galvanizing, "electroplating",  "hot-dip galvanizing" using molten zinc, "mechanical plating" and "zinc dust paint spraying", all of which have different appliances, advantages and disadvantages.