According to the shape of spangles, what are the main types of packaging steel strips?
by：Hongmei
2021-03-15
According to the shape of spangles, what are the main types of packaging steel strips?
(1) Spangle-free products. There is no spangle accelerating element added in the zinc solution, and there is no spangle formed when the coating is solidified, the crystal grain is very fine, smooth and smooth, so it is called a spangle-free product. It has superior corrosion resistance and good coating performance, and is suitable for various applications in modern industry. It is an ideal substrate for color-coated plates. It is the leading product in foreign countries and is increasingly accepted by people in China.
(2) Large spangle products. Spangle accelerating elements are added to the zinc solution, so beautiful spangles are formed when the coating is solidified. In the initial stage of use, the appearance performance is good, but the crystal grains are coarse, there are fine unevenness, and the coating performance is not very good, especially after a period of use, blackening will occur. It has been gradually eliminated in foreign countries, and can only be used for civil products in China. Strictly speaking, it cannot be used as a color-coated substrate. Among them, spangles were promoted by early use of lead. In recent years, in order to overcome the blackening phenomenon of lead, the method of adding antimony was used to form spangles.
(3) Small spangle products. There is no strict definition of small spangle products. Generally, products with smaller spangles are called small spangle products. For example, spangles with a diameter of more than 4mm are called large spangles, and those with a diameter of less than 4mm are called small spangles. Small spangles are made of large spangle products, such as zinc liquid that also contains lead or antimony. To overcome the defects of poor coating performance of large spangle products, various methods are used to inhibit the growth of spangles during cooling, and finally spangles with a small diameter are formed. Since it does not have a mirror-like smooth surface like a large spangle, and it is not as smooth as the first spangle product, it has the best coating performance and is the most ideal substrate for color-coated panels. And because two different products can be produced in the same pot, it was once favored by manufacturers.
(4) Finishing spangle products. Smoothing spangles are galvanized products on the basis of no spangles or small spangles, and the surface is smoothed again to make the surface smoother and more suitable for the needs of modern industrial products. Strictly speaking, the color-coated substrate must use smooth spangle. With the improvement of product grades in the future, smooth spangle products will definitely be used in large quantities.
(1) Spangle-free products. There is no spangle accelerating element added in the zinc solution, and there is no spangle formed when the coating is solidified, the crystal grain is very fine, smooth and smooth, so it is called a spangle-free product. It has superior corrosion resistance and good coating performance, and is suitable for various applications in modern industry. It is an ideal substrate for color-coated plates. It is the leading product in foreign countries and is increasingly accepted by people in China.
(2) Large spangle products. Spangle accelerating elements are added to the zinc solution, so beautiful spangles are formed when the coating is solidified. In the initial stage of use, the appearance performance is good, but the crystal grains are coarse, there are fine unevenness, and the coating performance is not very good, especially after a period of use, blackening will occur. It has been gradually eliminated in foreign countries, and can only be used for civil products in China. Strictly speaking, it cannot be used as a color-coated substrate. Among them, spangles were promoted by early use of lead. In recent years, in order to overcome the blackening phenomenon of lead, the method of adding antimony was used to form spangles.
(3) Small spangle products. There is no strict definition of small spangle products. Generally, products with smaller spangles are called small spangle products. For example, spangles with a diameter of more than 4mm are called large spangles, and those with a diameter of less than 4mm are called small spangles. Small spangles are made of large spangle products, such as zinc liquid that also contains lead or antimony. To overcome the defects of poor coating performance of large spangle products, various methods are used to inhibit the growth of spangles during cooling, and finally spangles with a small diameter are formed. Since it does not have a mirror-like smooth surface like a large spangle, and it is not as smooth as the first spangle product, it has the best coating performance and is the most ideal substrate for color-coated panels. And because two different products can be produced in the same pot, it was once favored by manufacturers.
(4) Finishing spangle products. Smoothing spangles are galvanized products on the basis of no spangles or small spangles, and the surface is smoothed again to make the surface smoother and more suitable for the needs of modern industrial products. Strictly speaking, the color-coated substrate must use smooth spangle. With the improvement of product grades in the future, smooth spangle products will definitely be used in large quantities.
