Galvanized square pipe is a kind of hollow square sectional steel pipe with square section shape and size made of hot rolled or cold rolled galvanized strip steel or galvanized coil as billet by cold bending processing and then by high frequency welding, or the cold formed hollow steel pipe made in advance by hot dip galvanized square pipe processing.

Classify

Galvanized square pipe from the production process is divided into hot galvanized square pipe and cold galvanized square pipe. It is precisely because the processing of these two galvanized square pipes is not the same that they have many different physical and chemical properties. In general, there are many differences in strength, toughness and mechanical properties.

Hot-dip galvanized square pipe

Hot-dip galvanized square tube: It is a square tube welded after the use of steel plate or steel strip crimping, and on the basis of this square tube, the square tube is placed in the hot-dip galvanized pool after a series of chemical reactions. The production process of hot-dip galvanized square pipe is relatively simple, and the production efficiency is very high, the varieties and specifications are also many, and the equipment and funds required for this kind of square pipe are very little, which is suitable for the production of small galvanized square pipe manufacturers. However, in terms of strength, the strength of this steel pipe is far lower than that of seamless square pipe.

Cold galvanized square pipe

The cold galvanized square pipe is to use the principle of cold galvanized on the square pipe used to make the square pipe have anti-corrosion performance. Different from hot-dip galvanized coating, cold galvanized coating is mainly anti-corrosion through the electrochemical principle, so it is necessary to ensure that the zinc powder is in full contact with the steel, resulting in electrode potential difference, so the surface treatment of steel is very important.

Purpose

Because the galvanized square pipe is galvanized on the square pipe, the application range of galvanized square pipe has been greatly expanded compared with the square pipe. It is mainly used in curtain wall, construction, machinery manufacturing, steel construction projects, shipbuilding, solar power generation bracket, steel structure engineering, power engineering, power plant, agriculture and chemical machinery, glass curtain wall, automobile chassis, airports and so on.

characteristic

Galvanizing has stronger protective effect and strong corrosion resistance. The entire structure is made of zinc, forming a dense quadruple junction crystal, which forms a barrier on the steel plate and thus effectively prevents the penetration of corrosion factors. Corrosion resistance The barrier layer from zinc provides strong protection. When zinc is sacrificed for protection in the cut edges, scratches and abrasion parts of the coating, zinc forms an insoluble oxide layer, which acts as a barrier protection