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I beam


I-beams are widely used in various building structures, bridges, vehicles, supports, machinery, and so on. Ordinary and light I-beams have wing roots that gradually thin towards the edge at a certain angle. The type of ordinary and light I-beams is expressed by an Arabic numeral.

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Is the galvanized coil plate resistant to high temperature


The melting point of zinc is 419.5 ℃, and its chemical properties are vivid. In air at room temperature, a thin and dense basic zinc carbonate film is formed on the surface, which can prevent further oxidation. When the temperature reaches 225 ℃, zinc oxidizes violently and appears as white zinc oxide. After high-temperature barbecue, the anti-corrosion material on the surface of the galvanized sheet is oxidized, so the galvanized sheet cannot withstand high temperatures. The surface may change color when heated, or other protective substances on the surface may turn yellow after oxidation.

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The process flow of galvanized rolled sheet


1. Cold rolled steel plates are degreased through alkaline washing, washed with water, dried, and then annealed in a horizontal (vertical) heating furnace heated by a radiation tube. A certain amount of hydrogen gas is introduced into the furnace to reduce the atmosphere in the early stage. 2. Steel strips heated to a certain temperature are immersed in zinc solution under certain conditions for hot-dip galvanizing. 3. The size of zinc flakes is controlled by the composition of liquid zinc, and at the same time, forced cooling is used to control. Before the diffusion of zinc flakes begins, small zinc flake products are quenched using small zinc flake equipment to prevent the zinc liquid from continuing to spread, forming small zinc flakes. 4. After being cooled by hot dip galvanizing, the product undergoes surface finishing, and finally undergoes surface passivation treatment or direct production into color coated rolled sheets according to its purpose.

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