Galvanized square pipe is a hollow square cross-section steel pipe with a square cross-section shape and size made from hot-rolled or cold-rolled galvanized strip steel or galvanized coil plate, which is formed by cold bending and then high-frequency welding. Or the pre-made cold-formed hollow steel pipe is processed by hot-dip galvanizing to form a galvanized square rectangular pipe.
Classification of Galvanized Square Pipe
Galvanized square tubes are divided into hot-dip galvanized square tubes and cold-dip galvanized square tubes in terms of production technology. It is precisely because the processing of these two galvanized square tubes is different that they have many different physical and chemical properties. Generally speaking, they have many differences in strength, toughness and mechanical properties.
Hot dipped galvanized square tube:
It is a square tube made by welding steel plates or steel strips after curling and forming, and then placing the square tube in a hot-dip galvanizing pool after a series of chemical reactions to form a square tube.
The production process of hot-dip galvanized square tubes is relatively simple, the production efficiency is very high, and there are many varieties and specifications. This kind of square tubes requires very little equipment and funds, and is suitable for the production of small galvanized square tube manufacturers. However, in terms of strength, the strength of this steel pipe is far lower than that of seamless square pipes.
Cold dipped galvanized square tubes:
Cold-dip galvanized square tubes use the principle of cold galvanizing to make the square tubes anti-corrosion. Unlike hot-dip galvanizing, cold-dip galvanizing mainly uses electrochemical principles to prevent corrosion. Therefore, it is necessary to ensure that the zinc powder is in full contact with the steel to generate an electrode potential difference, so the surface treatment of the steel is very important.
Application of galvanized square pipe
Since galvanized square pipes are galvanized on the square pipes, the application range of galvanized square pipes has been greatly expanded compared to square pipes. It is mainly used in curtain walls, construction, machinery manufacturing, steel construction projects, shipbuilding, solar power generation brackets, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, automobile chassis, airports, etc.
Characteristics of galvanized square pipe
Galvanizing has stronger protective effect and strong corrosion resistance. The entire structure is made of zinc, forming a dense quaternary crystal. This crystal forms a barrier on the steel plate, thus effectively preventing corrosion factors from penetrating. Corrosion resistance comes from the strong protective barrier layer of zinc. When zinc provides sacrificial protection on trimmed edges, scratches, and abraded parts of the coating, the zinc forms an insoluble oxide layer and exerts a barrier protection function.
