T: +86-182-2202-9592
E: yuantai@yuantai-steel.com
E: yuantai@yuantai-steel.com
No.1 Science and Technology Road, DaQiuZhuang Industrial Zone, Jinghai, Tianjin, China 301606
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Product Details:
Product name | Buy Hot Rolled Zn-al-mg Steel Coil Asian |
Standard | EN10324, JIS G 3323-2012, ASTM A 1046, etc. |
Material thickness | 0.25~4.0mm |
Material width | 550~960mm |
Coating weight | 20g/m2~400g/m2 |
The content of aluminum and magnesium are 2 kinds of combinations, which are low aluminum and low magnesium medium aluminum and medium magnesium, that is, 1.5 magnesium 2 aluminum, 3 magnesium 6 aluminum. Surface treatment can be consulted in detail. | |
Delivery | 7-30 days |
Payment Method | TT/LC |
Port | Tianjin Xingang Port |
The role of each element in Buy Hot Rolled Zn-al-mg Steel Coil Asian：
Al, Mg, Si and other alloy elements are added to the Zn-al-mg Steel Coil coating, which greatly improves the corrosion inhibition effect of the coating. Compared with ordinary galvanized products, the coating has less adhesion but can achieve better corrosion resistance. It is a hot-dip 10 to 20 times that of galvanized steel plate.
Like high-strength steel, the good corrosion resistance of zinc-aluminum-magnesium is determined by its structure, which in turn is determined by its chemical composition and cooling rate. Let's discuss the selection of chemical components of zinc-aluminum-magnesium coating and the role of each element.
1. The role and influence of magnesium
The role of magnesium is first to improve corrosion resistance. Secondly, adding a little 0.1% magnesium to the plating solution can improve the wettability of the strip in the plating solution, reduce the surface tension of the plating solution, and reduce the occurrence of missing plating defects. This This is because the magnesium oxide is not dense and basically exists in a very loose state. This seems to be somewhat complementary to the characteristics of aluminum, and is of great significance to the use of coatings with higher aluminum content to produce high-strength steel with higher alloy content. However, in the zinc-aluminum-magnesium plating bath, the magnesium content is relatively high, and the problem of non-dense magnesium oxides will bring about a series of side effects, becoming a major difficulty in the production of hot-dip galvanized aluminum-magnesium products.
2. The role and influence of aluminum
First of all, adding aluminum on the basis of galvanizing can significantly improve the corrosion resistance and heat resistance, which is also true for zinc, aluminum and magnesium coatings; secondly, adding a small amount of aluminum during galvanizing can inhibit the interaction between zinc liquid and iron. reaction, thinning the Fe-Zn compound layer; finally, aluminum can inhibit the limitations of magnesium oxidation. The aluminum oxide is very dense, which can reduce the impact of magnesium's loose oxide.
Among these three characteristics, the first has only advantages and no disadvantages, but the second and third are double-edged swords. Like magnesium, aluminum is present in high concentrations in zinc-aluminum-magnesium plating baths. On the one hand, aluminum inhibits the reaction between zinc and iron, but the reaction between aluminum and iron becomes more intense, which becomes the main contradiction; on the other hand, the problem that aluminum is easily oxidized will also bring about a series of problems, which has also become a problem in the production of zinc, aluminum and magnesium products. a big problem.
3. The role and influence of silicon
The main purpose of adding silicon is to inhibit the reaction between aluminum and iron, thin the compound layer between the coating and the steel base, and improve processing performance. This is the same principle as all high-aluminum coatings.
As long as the aluminum content is higher than the eutectic composition of the coating, silicon must be added. The higher the aluminum content, the more silicon is added. The highest aluminum-silicon coating adds about 10% silicon; the second is aluminum-zinc-silicon coating, which adds about 1.5% silicon; SD adds 0.2% silicon, and ZAM can add 0.1% silicon. In addition, silicon can also refine grains, improve the uniformity of the structure, and inhibit intergranular oxidation.
4. The role of other elements
Since the composition of zinc, aluminum, and magnesium is very complex, the process performance has also become very complex. In order to produce qualified products using zinc, aluminum, and magnesium as the main components, a small amount of other elements can be added to improve the performance and use of the hot-dip process. Performance, known as the fourth element of zinc, aluminum and magnesium coating composition.
Product Details:
Product name | Buy Hot Rolled Zn-al-mg Steel Coil Asian |
Standard | EN10324, JIS G 3323-2012, ASTM A 1046, etc. |
Material thickness | 0.25~4.0mm |
Material width | 550~960mm |
Coating weight | 20g/m2~400g/m2 |
The content of aluminum and magnesium are 2 kinds of combinations, which are low aluminum and low magnesium medium aluminum and medium magnesium, that is, 1.5 magnesium 2 aluminum, 3 magnesium 6 aluminum. Surface treatment can be consulted in detail. | |
Delivery | 7-30 days |
Payment Method | TT/LC |
Port | Tianjin Xingang Port |
The role of each element in Buy Hot Rolled Zn-al-mg Steel Coil Asian：
Al, Mg, Si and other alloy elements are added to the Zn-al-mg Steel Coil coating, which greatly improves the corrosion inhibition effect of the coating. Compared with ordinary galvanized products, the coating has less adhesion but can achieve better corrosion resistance. It is a hot-dip 10 to 20 times that of galvanized steel plate.
Like high-strength steel, the good corrosion resistance of zinc-aluminum-magnesium is determined by its structure, which in turn is determined by its chemical composition and cooling rate. Let's discuss the selection of chemical components of zinc-aluminum-magnesium coating and the role of each element.
1. The role and influence of magnesium
The role of magnesium is first to improve corrosion resistance. Secondly, adding a little 0.1% magnesium to the plating solution can improve the wettability of the strip in the plating solution, reduce the surface tension of the plating solution, and reduce the occurrence of missing plating defects. This This is because the magnesium oxide is not dense and basically exists in a very loose state. This seems to be somewhat complementary to the characteristics of aluminum, and is of great significance to the use of coatings with higher aluminum content to produce high-strength steel with higher alloy content. However, in the zinc-aluminum-magnesium plating bath, the magnesium content is relatively high, and the problem of non-dense magnesium oxides will bring about a series of side effects, becoming a major difficulty in the production of hot-dip galvanized aluminum-magnesium products.
2. The role and influence of aluminum
First of all, adding aluminum on the basis of galvanizing can significantly improve the corrosion resistance and heat resistance, which is also true for zinc, aluminum and magnesium coatings; secondly, adding a small amount of aluminum during galvanizing can inhibit the interaction between zinc liquid and iron. reaction, thinning the Fe-Zn compound layer; finally, aluminum can inhibit the limitations of magnesium oxidation. The aluminum oxide is very dense, which can reduce the impact of magnesium's loose oxide.
Among these three characteristics, the first has only advantages and no disadvantages, but the second and third are double-edged swords. Like magnesium, aluminum is present in high concentrations in zinc-aluminum-magnesium plating baths. On the one hand, aluminum inhibits the reaction between zinc and iron, but the reaction between aluminum and iron becomes more intense, which becomes the main contradiction; on the other hand, the problem that aluminum is easily oxidized will also bring about a series of problems, which has also become a problem in the production of zinc, aluminum and magnesium products. a big problem.
3. The role and influence of silicon
The main purpose of adding silicon is to inhibit the reaction between aluminum and iron, thin the compound layer between the coating and the steel base, and improve processing performance. This is the same principle as all high-aluminum coatings.
As long as the aluminum content is higher than the eutectic composition of the coating, silicon must be added. The higher the aluminum content, the more silicon is added. The highest aluminum-silicon coating adds about 10% silicon; the second is aluminum-zinc-silicon coating, which adds about 1.5% silicon; SD adds 0.2% silicon, and ZAM can add 0.1% silicon. In addition, silicon can also refine grains, improve the uniformity of the structure, and inhibit intergranular oxidation.
4. The role of other elements
Since the composition of zinc, aluminum, and magnesium is very complex, the process performance has also become very complex. In order to produce qualified products using zinc, aluminum, and magnesium as the main components, a small amount of other elements can be added to improve the performance and use of the hot-dip process. Performance, known as the fourth element of zinc, aluminum and magnesium coating composition.
