The difference between hot-dip galvanized square tube and cold-dip galvanized square tube
Release time:
2023-03-14
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.
There are two types of hot-dip galvanized square tubes and electro-galvanized square tubes. There are wet method, dry method, lead-zinc method, redox method and so on for hot-dip galvanized square tube. The main difference between different hot-dip galvanizing methods is the method used to activate the surface of the pipe body to improve the quality of galvanizing after the steel pipe is pickled and cleaned. Dry method and oxidation-reduction method are mainly used in the current production, and their characteristics are shown in the table. The surface of the electro-galvanized zinc layer is very smooth and dense, with a uniform structure; it has good mechanical properties and corrosion resistance; the zinc consumption is 60% to 75% lower than that of hot-dip galvanizing. Electrogalvanizing is technically complex, but it must be used for single-sided coating, double-sided coating with different thicknesses on the inner and outer surfaces, and thin-walled tube galvanizing.
Galvanized square tube use
Galvanized has a stronger protective effect and strong corrosion resistance. The entire structure is composed of zinc, forming a dense quaternary crystal, which forms a barrier on the steel plate, thus effectively preventing the penetration of corrosion factors. Corrosion resistance comes from the strong protective function of the barrier layer of zinc. When zinc is used for sacrificial protection on cut edges, scratches and scratches on the coating, zinc forms an insoluble oxide layer to perform barrier protection.
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.
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