Galvanized square steel pipe
Galvanized square steel pipe is a kind of hollow square-section steel pipe with a square cross-section shape and size made of hot-rolled or cold-rolled galvanized strip steel or galvanized coil sheet as a blank, cold bending, and then high-frequency welding. , or a galvanized square and rectangular tube made by hot-dip galvanizing of the cold-formed hollow steel pipe made in advance.
Galvanized square steel pipe is divided into hot-rolled galvanized square steel pipe and cold-rolled galvanized square steel pipe from the production process. It is precise because of the different processing of these two galvanized square steel pipes that they have many different physical and chemical properties. In general, they have many differences in strength, toughness, and mechanical properties.
Classification of galvanized square steel pipe
Hot rolled galvanized square steel pipe
Hot-rolled galvanized square steel pipe: It is a square pipe made of steel plate or steel strip after crimping and welding, and on the basis of this square pipe, the square pipe is placed in a hot-dip galvanized pool after a series of chemical reactions. Another kind of square tube is formed. The production process of hot-rolled galvanized square steel pipe is relatively simple, the production efficiency is very high, and there are many varieties and specifications. This kind of square pipe requires little equipment and capital and is suitable for the production of small galvanized square steel pipe manufacturers. But in terms of strength, the strength of this kind of steel pipe is far lower than that of seamless square pipe.
Cold rolled galvanized square steel pipe
The cold-rolled galvanized square steel pipe uses the principle of cold galvanizing on the square tube used to make the square tube have anti-corrosion properties. Different from hot-dip galvanizing, cold galvanizing coatings mainly carry out anti-corrosion through electrochemical principles. Therefore, it is necessary to ensure that the zinc powder and steel are in complete contact, resulting in electrode potential difference, so the surface treatment of steel is very important.
Difference between hot and cold galvanizing
Galvanized square steel pipe has two categories: hot-rolled galvanized square steel pipe and electric galvanized square steel pipe. Hot-rolled galvanized square steel pipe has a wet method, dry method, lead-zinc method, redox method, etc. The main difference between different hot-dip galvanizing methods is what method is used to activate the surface of the pipe body to improve the quality of galvanizing after the steel pipe is acid-dipped and cleaned. The dry method and the redox method are mainly used in production, and their characteristics are shown in the table. The surface of the zinc layer of electro-galvanizing is very smooth and dense, and the structure is uniform; it has good mechanical properties and corrosion resistance; the zinc consumption is 60% to 75% lower than that of hot-dip galvanizing. Electro galvanizing is technically complicated, but this method must be used for single-sided coating, double-sided coating with different thicknesses on the inner and outer surfaces, and galvanizing of thin-walled pipes. The above is the classification of galvanized square steel pipe.
Use of galvanized square steel pipe
Since the galvanized square steel pipe is galvanized on the square pipe, the application scope of the galvanized square steel pipe has been greatly expanded compared with the square pipe. It is mainly used in curtain walls, construction, machinery manufacturing, steel construction projects, shipbuilding, solar power brackets, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, automobile chassis, airports, etc. The above is the use of galvanized square steel pipe.
Characteristics of galvanized square steel pipe
Galvanized has a stronger protective effect and strong corrosion resistance. The whole structure is made of zinc, forming a dense quaternary crystal, which forms a barrier on the steel plate, thus effectively preventing the penetration of corrosion factors. The corrosion resistance comes from the strong protective function of the barrier layer of zinc. When zinc is used as sacrificial protection in the cut edges, scratches, and coating scratches, zinc will form an insoluble oxide layer and play a barrier protection function. The above are the characteristics of galvanized square steel pipe. If you want to know more about galvanized square steel pipe, welcome to pay attention to an excellent supplier of galvanized square steel pipe, JIANGSU TISCO INDUSTRIAL CO., LTD, which is a factory specializing in the production of steel, with more than ten years of export experience, welcome Everyone come to inquire to buy.
Post time: Oct-17-2022