Complex physical, chemical reaction happened between steel tube and the molten bath, which could create a corrosion resisting zinc-iron alloy layer. The layer is tightly bond with the zinc layer and steel tube, so the pipe could have a strong corrosion resisting ability. Hot galvanizing is a kind of technology we use to make the plating equal, adhering well and life-cycle long. The first step of the hot galvanizing is pickle, which could remove the iron oxide on the surface, then the pipe go through the ammonia chloride solution or zinc chloride solution or mix solution of the front two. After that, it will be go through the hot dip tank to finish the process. Galvanization could make the pipe a strong protecting and anti-corrosion quality. The structure of the pipe’s surface is connected by zinc-four element crystals to create a protective screen and keep the corrosion factor out. When the zinc is side cutting, scraping or any other damaging, the zinc cannot act as a protecting layer to the pipe. Galvanized square pipe is galvanizing on the square pipe, which gives the square pipe a wider range of use, including (glass) wall, building, mechanical manufacture, iron manufacture, ship building, bracket of solar power generation sets, structural steelwork, electrical engineering, Agricultural and chemical machinery, automobile chassis, airports, etc.

characteristics: 1. adapts to the buried and humid environment, and resistant to high and low temperature. 2. strong anti-interference ability, if the plastic pipe is used as the cable casing, it can effectively shield the signal interference from the outside. 3. endure the pressure up to 6Mpa. 4. good insulation performance, as the protection of the wire tube the pipe will never be leakage. 5. smooth pipe with no burr, suitable for the construction of the time to wear a wire or cable. Galvanized substrate color coating, except for protection of zinc, organic coatings on the zinc layer can prevent corrosion, the service life is longer than galvanized square pipe up to 50%. The material is pollution free, full cycle life, corrosion resistance, and high machinability. However, in different areas and parts, the same thickness of coating color coated on the tube may differs a lot.