It is a process of coating steel with zinc, in order to protects it agianst oxidation or corrosion.  It has a role for extending life time of metal. As it could be used to cover outside lighting and garden lighting poles.

Simply it could be done by preparing surface wanted to be galvanized by removing all dirts over metal surface. After that it is being placed inside a pool of molten zinc, thus to be coated with. Then galvanized pieces is being taken out from pool and tested for its coat thickness, shape, and weight in order to be compared with related international standards using different procedures.
Finally, if all things go in correct way, product is ready for outside use. But also, a layer of paint could be given to change outside color in order to give a more beautiful standy shape.