Galvanized square tube is a kind of hot-rolled or cold-rolled galvanized strip or galvanized coil blank by cold bending molding and then by high-frequency welding made of square cross-sectional shape and size of the hollow square cross-section steel pipe, or the advance of the cold-formed hollow steel pipe and then by hot-dip galvanizing processing of galvanized。
Galvanized square tube from the production process is divided into hot-dip galvanized square tube and cold galvanized square tube.It is because of the different processing of these two galvanized square tube also makes them a lot of different physical and chemical properties.In general they have a lot of difference in strength, toughness and mechanical properties.
Cold galvanized square tube is used in the square tube using the principle of cold galvanized to make the square tube with anti-corrosion properties.Galvanizing different cold galvanizing coating mainly through the electrochemical principle to corrosion, it is necessary to ensure full contact with the zinc powder and steel, resulting in electrode potential difference, so the steel surface treatment is very important.
Since the galvanized square tube is carried out in the square tube galvanized treatment, so that the scope of application of the galvanized square tube than the square tube has been greatly expanded.It is mainly used in curtain wall, construction, machinery manufacturing, steel construction projects, shipbuilding, solar power bracket, steel structure engineering, power engineering, power plant, agriculture and chemical machinery, glass curtain wall, automobile chassis, airport, etc.
