The difference between galvanized sheet and galvanized sheet

The coating structure of the aluminum-zinc alloy coating plate is Al-Zn alloy, and the coating composition is 55% Al, 43.3% Zn, 1.6% Si. Its surface is smooth and has excellent atmospheric corrosion resistance, which is 2-6 times higher than the same hot-dip galvanized sheet. It has high temperature corrosion resistance similar to hot-dip aluminum plate, and can be used for a long time without any discoloration or deformation at a high temperature of 315 degrees. The water corrosion resistance is better than that of the hot-dip galvanized sheet and the hot-dip aluminized sheet, and the soil corrosion resistance is better than that of the hot-dip galvanized sheet. Its thermal reflectivity is higher than 75%, which is twice that of ordinary galvanized sheet. It has good paintability and processability, and is gradually replacing galvanized sheet and is widely used in the world.
Hot-rolled galvanized sheet Hot-rolled galvanized sheet is a galvanized sheet produced directly by pickling and galvanizing with hot-rolled sheet as the substrate. The board can be widely used in construction, automobiles, steel silos, railway passenger cars, highway guardrail boards, etc. At present, the domestic production of hot-rolled galvanized sheet is relatively small, and most of the galvanized production lines that have been completed and put into production are galvanized sheet with cold-rolled sheet as the substrate. Compared with cold-rolled galvanized sheet, the difference in performance between hot-rolled galvanized sheet and cold-rolled galvanized sheet is not very big. Because hot-rolled galvanized sheet saves the cold rolling process, the production cost is lower, and it has obvious price advantage. Model: DC51 (hot-dip galvanizing) hot-dip galvanizing can be divided into non-alloy galvanized and alloyed galvanized. Non-alloy galvanized materials include general purpose, mechanical bite, deep drawing, and ultra-deep drawing. When the amount of galvanizing is large, the corrosion resistance is superior, and it can be used for exposed parts.
The aluminum-zinc alloy structure of the galvanized steel sheet is composed of 55% aluminum, 43.4% zinc and 1.6% silicon solidified at a high temperature of 600 ° C. The entire structure is composed of aluminum-iron-silicon-zinc, forming a dense quaternary crystal. Thus forming a layer of barrier that effectively prevents the penetration of corrosion factors. It has the following advantages: 1. Excellent durability 2. Excellent thermal reflectivity 3. Excellent heat resistance 4. Although the price is more expensive than galvanized sheet, it has a high cost performance in terms of service life. 169chunping19882019-12-23Answer Aluminized steel plate is a steel plate with aluminum-silicon alloy coating, in which the aluminum content is 90% and the silicon is 10%. Aluminized steel sheet has good heat resistance, heat reflection and corrosion resistance, and its mechanical and physical properties are better than cold-rolled steel sheet. Due to the superior performance of aluminized steel sheet, it has been widely used in our daily necessities. Such as car mufflers, household appliances, etc.
Galvanized sheet refers to a steel sheet plated with a layer of zinc on the surface. Galvanizing is an economical and effective anti-corrosion method that is often used, and about half of the total zinc production is used in this process. The material of galvanized sheet: ① hot-dip galvanized steel sheet. Immerse the thin steel sheet in a molten zinc bath so that the surface of the sheet is adhered with a layer of zinc. At present, it is mainly produced by continuous galvanizing process, that is, galvanized steel plate is made by continuously immersing rolled steel plates in a plating tank with molten zinc; ② Alloying galvanized steel plates. This kind of steel plate is also hot-dipped, but after it is out of the groove, it is heated to about 500 ℃ immediately to form an alloy film of zinc and iron. This galvanized sheet has good paint adhesion and weldability; ③ electro-galvanized steel sheet. This galvanized steel sheet has good properties by electroplating. However, the coating is thin, and the corrosion resistance is not as good as that of hot-dip galvanized sheet; ④ single-sided and double-sided poor galvanized steel. Single-sided galvanized steel sheets are products that are galvanized on only one side. In welding, painting, anti-rust treatment, etc., it has better adaptability than double-sided galvanized sheet. In order to overcome the shortcomings of uncoated zinc on one side, there is a galvanized sheet coated with a thin layer of zinc on the other side.