November 17, 2022
1. 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.
2. 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. 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.
3. The aluminum-zinc alloy structure of the aluminum-zinc-coated steel plate 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 crystals, thus forming a strong and effective barrier to prevent 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.
4. Galvanized sheet refers to a steel sheet with a layer of zinc plated 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.
①Hot 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;
②Alloyed galvanized steel sheet. 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 the hot-dip galvanized sheet;
④Single-sided and double-sided differential 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.
