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Is the galvanized coil plate resistant to high temperature

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.

09

2021

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11

The process flow of galvanized rolled sheet

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.

09

2021

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11

What is the purpose of steel coils? How to judge the material of steel coils

What is the purpose of steel coils? How to judge the material of steel coils

There are many essential things in our daily life. No matter what we want to purchase, we must first understand some knowledge. This way, it will be easy to make a choice on the surface. Therefore, we can first take a look at the purpose of steel coils. Only by understanding their purpose can we know where to use these things, and also look at how to determine the material of steel coils.

29

2023

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03

How to judge the quality of color coated rolls

How to judge the quality of color coated rolls

For the current construction market, there are many new building materials, but the diversity of color coated rolls has gradually become a popular choice. The important thing is that it can meet people's needs in all aspects. Due to the increasing demand for building materials, people should pay attention to quality issues when purchasing building materials. Therefore, it is very important to determine the quality of building materials.

29

2023

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03

Classification and process of galvanized rolled sheet

Classification and process of galvanized rolled sheet

① Galvanized coils immerse thin steel plates in a molten zinc bath, and attach a layer of zinc to the surface of the steel plates. Currently, the main consumption of galvanized steel plates is through continuous galvanizing process, that is, rolling steel plates continuously immerse them in a galvanized bath for zinc condensation. ② The alloy galvanized sheet bending machine is also a hot-dip steel plate, but it is immediately heated to around 500 ℃ after coming out of the groove. The alloy coated galvanized sheet that forms zinc and iron has good coating adhesion and weldability. ③ The galvanized steel plate used for galvanized coil electroplating has good processing performance. However, the coating of galvanized pipes is thinner than that of hot-dip galvanized sheets, and their corrosion resistance is also poor. ④ Single sided galvanized and double sided differential galvanized coils, single sided galvanized steel plates, that is, single sided galvanized products have better compliance in welding, painting, rust prevention treatment, processing, and other aspects than double sided galvanized sheets. In order to suppress the defect of non galvanizing on one side, a thin layer of galvanized sheet, namely double-sided differential galvanized sheet, is applied to the other side. ⑤ Alloy, composite galvanized coil This is an alloy made of zinc and other metals such as lead, zinc, etc. It is a composite steel plate, galvanized pipe, and steel plate that not only has excellent rust prevention performance, but also has good coating performance.

29

2023

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03

Reasons for Bubbles During Welding of Color Coated Plates

Reasons for Bubbles During Welding of Color Coated Plates

During the welding of color coated panels, bubbles may sometimes appear due to external factors, which can make the welding unstable and also affect the aesthetics. Therefore, we should try our best to avoid this situation when welding. What is the reason for this phenomenon? Only by finding the cause can we better solve it. Let's explain it to everyone below. If the surface of the weld seam on the color coated plate is not cleaned thoroughly, it is easy to cause the appearance of bubbles, such as the presence of oil stains, moisture, and other components. We can solve this problem by cleaning the surface of the weld to be welded. 2. Impurity of protective gas can also lead to the generation of bubbles, and 99.99% argon gas can be used to address this issue. If the welding wire end is exposed to air, bubbles may also occur. So, we need to keep the end of the welding wire under the protection of inert gas when welding the color coated plate. The three methods introduced above can effectively prevent the generation of bubbles during the welding of color coated plates. For bubbles that have already appeared, we can directly use an angle grinder to grind them off. In future practical operations, everyone can refer to the content introduced in this article, and I believe it can effectively solve your problem.

28

2022

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07

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