First, it is easy to process-the seismic support coated with zinc, aluminum and magnesium can be directly cut and used;
Traditional hot dip galvanizing coating process: workpiece → degreasing → water washing → pickling → water washing → immersion of plating auxiliary solvent → drying and preheating → hot dip galvanizing → finishing → cooling → passivation → rinsing → drying → inspection. If the previous process is not well operated, it will cause a chain reaction in the subsequent process, which will greatly increase the operating cost or cause poor hot dip galvanized products. If the pretreatment is not good, molten zinc can not react with steel normally and completely, forming the most perfect galvanized film structure. If the post-treatment is not good, it will destroy the appearance of galvanized film and reduce the commodity value. Traditional hot dip galvanizing needs galvanizing, touch-up, surface treatment and repeated logistics after cutting, and the process is cumbersome. Compared with this, the zinc-aluminum-magnesium coated bracket is directly cut and used without secondary treatment, which is light and beautiful!
Therefore, compared with the traditional coating, Zn-Al-Mg coating reduces a lot of time, manpower, material resources and financial resources, and has a high cost performance!
Second, automatic repair-zinc, aluminum and magnesium automatically repair the coating of cutting, stamping and section;
The reason is that the paint reacts chemically in the air, magnesium ions first form magnesium hydroxide, and then magnesium hydroxide absorbs carbon dioxide to form magnesium carbonate. This substance has a buffering effect on PH value, which reduces the dissolution rate of zinc in anode area and inhibits the formation of zinc oxide. Magnesium promotes the formation of dense corrosion products and reduces the diffusion rate of dissolved oxygen, thus reducing the oxygen reduction rate in the cathode region. Among them, magnesium ions and oxygen ions undergo redox reaction, and the "white rust" protective layer formed on the stent realizes automatic repair.
Therefore, when the coating is damaged by cutting, punching and cross-cutting, magnesium ions will migrate to the damaged part of the coating through redox reaction, forming a dense magnesium carbonate protective film, which is dense but not fatal! So as to achieve the function of automatic repair.
Third, corrosion resistance-the corrosion resistance of Zn-Al-Mg material is 5- 10 times stronger than that of traditional hot dip galvanizing;
The traditional hot dip galvanized layer will produce red rust in the exposed part at the initial stage of corrosion, and the area of red rust will increase with the extension of corrosion time. However, Zn-Mg-Al coating is less and less, and a dense protective film "white rust" will be formed on the exposed part at the initial stage, and a dense protective layer will be formed on the stent to achieve self-healing effect.
Therefore, compared with traditional products, Zn-Al-Mg coating can achieve better corrosion resistance with less adhesion, saving materials, time and trouble! It has better protection ability for steel plate trimming, welding and coating damage caused by serious deformation.
4. Long service life-the service life of the Zn-Al-Mg seismic bearing is about 50 years;
The traditional hot-dip galvanizing is only 20-30 years, and the super corrosion resistance of the Zn-Al-Mg seismic bearing is 5- 10 times that of the common hot-dip galvanized steel plate, and it has the effect of automatic incision repair, so the service life of components made of alloy coating of hot-dip galvanized Al-Mg steel plate is as long as 50 years.