There are three ways of surface treatment:galvanized,painted and untreated,of which hot-galvanized surface treatment is recommended.

The hot dip galvanizing refers to the process and method of forming a zinc coating on its surface after putting the steel grating in melting zinc bath.The thickness of bearing bar is within the range of 3-5mm and the average thickness of zinc coating is about 70μm(our galvanizing coating thickness according to respective standard,ie,ASTM,BS729,etc.).Within the environmental arrange from PH6 to PH12.5,the stable protective film will be formed on the zinc surface,with good corrosion resistance.