Zinc aluminum magnesium color coating is a new type of zinc aluminum magnesium alloy coated steel plate. Compared to other coated sheet products, zinc aluminum magnesium coated color coatings have better corrosion resistance. Zinc, aluminum, magnesium, and alloy element names are generally sorted according to the content of the metal, with the highest content ranking first. So zinc aluminum magnesium refers to zinc alloys, which contain a small amount of aluminum and magnesium.
Baosteel provides a 30 year warranty commitment letter for zinc aluminum magnesium, and zinc aluminum magnesium color plates have better application prospects in automotive panels, shipbuilding industry, marine ranching, and other fields.
Li Ying | Tu Du
Zinc aluminum magnesium coated steel plates are made by adding certain trace elements such as aluminum magnesium to existing hot-dip galvanized or hot-dip aluminum zinc coatings, in order to improve the corrosion resistance and edge protection performance of the steel plates. It is mainly used for surface anti-corrosion treatment of steel and steel products.
01
What is zinc aluminum magnesium plate?
Zinc aluminum magnesium, as the name suggests, is an alloy metal mainly used for surface anti-corrosion treatment of steel and steel products. Initially, pure zinc was widely used for surface anti-corrosion treatment of steel products. With the improvement of technology, various experiments were conducted, and alloy metals such as aluminum zinc alloy and zinc aluminum magnesium alloy emerged, increasing the corrosion resistance effect of the metal layer. And through certain experiments on aluminum magnesium alloys, it was found that a better metal ratio can achieve better anti-corrosion effects.
The results of publicly available accelerated laboratory experiments and outdoor exposure experiments have shown that an increase in Al and Mg content within a certain range can improve corrosion resistance by several to ten times (as shown in the above figure).
Mechanism of planar corrosion prevention
When the content of Zn, Al, and Mg ternary eutectic phases in the entire coating structure reaches a certain level, the corrosion products are insoluble colloidal substances with low conductivity, which can effectively isolate the transmission of coating and external substances, forming a dense and effective protective layer on the surface of the steel plate to prevent corrosion. The cathodic reaction will be effectively suppressed with the appearance of this double-layer structure, significantly improving the corrosion resistance of the coating.
02
What are the advantages of zinc aluminum magnesium plate?
Excellent corrosion resistance
Like high-strength steel, the excellent corrosion resistance of zinc aluminum magnesium plates is determined by their microstructure. Magnesium can not only improve corrosion resistance, but also enhance the wettability of the strip steel in the plating solution, reduce the surface tension of the zinc solution, and reduce the occurrence of plating defects; Adding aluminum on the basis of galvanizing can significantly improve the corrosion resistance and heat resistance of steel plates.
Good self-healing and edge cutting protection performance
Coated steel plates often face secondary processing situations such as cutting and punching in construction applications, which often leads to corrosion of the steel plates. The zinc aluminum magnesium coating combines the cathodic protection of "zinc" and the active performance of "magnesium", accelerating the coverage of the coating on the incision area. The contact between "aluminum" and oxygen forms a stable aluminum oxide protective layer, protecting the substrate from erosion. The perfect combination of the three improves the self-healing effect of the steel plate.
Zinc aluminum magnesium plate
Good welding processing performance
Galvanized aluminum magnesium sheet has excellent self-healing function in cutting and punching positions, without the need for subsequent treatment. This special performance overcomes the inherent defects of traditional coated sheet, and has a high comprehensive cost-effectiveness. It can replace ordinary galvanized sheet, color steel, stainless steel, aluminum sheet and other building materials.
Zinc aluminum magnesium plate
Good scratch and corrosion resistance
Surface corrosion of coated steel plates mostly occurs at scratches, which are a phenomenon that is difficult to avoid for coated steel plates. Especially during the processing, if the coated steel plate itself has good scratch resistance, it can largely avoid scratches and improve its service life. The magnesium dissolved from the zinc aluminum magnesium plate from the coating can generate a fine, dense oxide film containing magnesium on the cut section, covering the steel substrate exposed at the scratch or cut area, thereby improving its scratch corrosion resistance.
The left one is a galvanized aluminum magnesium plate, the middle aluminum plate, and the right one is a hot-dip galvanized plate
Application scenarios of zinc aluminum magnesium steel plates
Under normal processing and usage conditions for building purposes, zinc aluminum magnesium sheets have better corrosion resistance, wear resistance, coating resistance, and good welding processability compared to other building materials.
More and more industries have begun to apply zinc aluminum magnesium panels, including in the construction (photovoltaic) industry, automobile manufacturing, animal husbandry, airports, high-speed rail construction, etc. Zinc aluminum magnesium plates can be directly processed and used, shortening the processing period of component products, and ensuring good controllability of project duration.
03
Quality Assurance Commitment for Baosteel Zinc Aluminum Magnesium Plate?
Warranty Period of Baosteel High Aluminum Zinc Aluminum Magnesium Steel Plate
Under normal processing and usage conditions for building purposes, BaoAM coated steel plates will not undergo corrosion perforation for 30 years.
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