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1. Passivation solution should be added first and then water should be added. Because of the density of the passivation solution, such as the density of the passivation solution is higher than that of water, it will cause uneven mixing of raw materials, and there will be poor adhesion between the passivation layer and the substrate, which is very easy to cause the surface of the color coated plate to explode.
2. There is a passivation plate temperature production process is 2 hours to check once, the reason is that the staff of the color coated plate manufacturer does not track the passivation plate temperature regularly when checking. Especially in winter, the temperature change is relatively large within 2 hours, which will eventually cause the aging of the color coated plate, and the phenomenon of scratching off the paint will occur when the pressure is pressed.
3. In the process of production of color coated plate, there is dust on the export inspection mirror, and there is dust on some rollers. The dust will directly affect the surface quality of the color coated plate.
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Galvanized corrugated steel sheet is made of galvanized steel. It is also known as corrugated GI sheet. It combines the strength of steel with the smooth surface of zinc coating. Due to its durability and beautiful appearance, it is widely used in many industry, especially roofing and wall panels. Compared to color coated steel sheet, GI corrugated steel sheet is more cost-effective. The available thickness is from 0.12 to 1.5 mm, and the width varies from 600 to 2,000 mm. Welcome to contact us for details!Read more
Corrugated steel roofing sheet is a versatile and durable material, which is ideal fo agricultural, residential and commercial applications. Wanzhi Steel uses PPGI or PPGL sheets to make different corrugated sheets to meet your needs. Also, there are various colors and patterns to suit various architectural styles. The popular design includes wave type, T type, trapezoidal type, tile, etc. The available thickness is 0.12 mm-1.2 mm and the effective width is from 750 mm to 1100 mm. The length can be customized. Welcome to contact us for more details!Read more
Galvalume Steel Coil is a kind of Alloy-Coated Steel Sheet widely used in building materials, household appliances,automobiles, environment, machinery, ships and many other fields. The surface coating of galvalume steel sheet is composed of 55% aluminium, 43.5% zinc and a small amount of other elements. 1. Heat reflectivity: Aluminum-coated galvanized steel sheet has a high thermal reflectivity, which is twice as high as galvanized steel sheet. It is often used as insulation material. 2. Heat resistance: Aluminum-zinc alloy steel sheet has good heat resistance and can withstand high temperatures of more than 300 degrees Celsius. 3. Corrosion resistance: The corrosion resistance of aluminized and galvanized steel coils is mainly due to the protective function of aluminium and aluminium. When zinc is abraded, aluminium forms a dense layer of alumina,which prevents further corrosion of corrosion-resistant substances. 4. Economy: Because the density of 55% Al-Zn is smaller than that of Zn, the area of galvanized steel sheet is more than 3% larger than that of galvanized steel sheet under the same weight and thickness of gold plating. 5. Easy to paint: Aluminum-coated galvanized sheet and paint have excellent adhesion and can be painted without pretreatment and weathering treatment. 6. Aluminum-galvanized steel sheet has a silver-white gorgeous surface.Read more
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