Zn-al-mg alloy coated steel plate is a new type of coating product, and it is also a field that many domestic steel mills have been involved in in recent years.
When we learn about a product, we usually want to know its history. We also need to know the products and development background of domestic and foreign manufacturers.After understanding these two aspects, we can have a more systematic and clear cognition
What is zinc, aluminum and magnesium coated steel plate?
According to the definition of European standard en10346-2015, zinc, aluminum and magnesium coating is a ternary alloy coating whose main component is zinc, in addition, the content of aluminum and magnesium is between 1.5~8% (whose content of magnesium is not less than 0.2%).
Compared with hot-dip galvanizing, aluminum-zinc plating and zinc-ferroalloy, zinc-aluminum-magnesium coating has better corrosion resistance
1, because zinc aluminum magnesium alloy coating is relatively thin, dense, not easy to occur coating peeling;
2. Corrosion products will flow and wrap the incision, so they have better protection for the incision and the incision;
3. Good corrosion resistance in some harsh corrosion environments (such as animal husbandry, coastal areas, etc.);
Development history of zinc, aluminum and magnesium coatings
It is widely believed in the industry that the commercial production and promotion of zinc, aluminum and magnesium coating steel plate is the Japanese steel and Nippon steel two steel mills.
Note: after the merger of Nippon steel and Nippon steel, Nippon steel is now renamed Nippon steel.
In the 1960s and 1970s, steel companies in the United States began to develop zinc, aluminum and magnesium coatings, but they were not commercially produced.
In the ninth century, rixin iron and Nippon steel have done a lot of work in the research and development of zinc, aluminum and magnesium alloy coating, made great progress and started the commercialization of zinc, aluminum and magnesium alloy coating plate.
European steel companies such as ArcelorMittal, Thyssen Krupp, Tara steel European and BlueScope, an established Australian steelmaker, have since succeeded in developing similar products under their own brands.
In recent years, domestic steel mills have also followed up, such as jiusteel, baosteel, steel enterprises such as tang steel have also begun to produce zinc, aluminum and magnesium coating steel plate.
Introduction of zinc, aluminum and magnesium products of major steel mills
ZAM
Steel plant: nissin steel (Japan)
Coating composition: Zn — 6%AI — 3%Mg
Birth time: developed successfully in 1999, and produced commercially around 2001.
Introduction: often regarded as the most authentic primary zinc aluminum magnesium coating products, known as the traditional zinc plating corrosion resistance of 20 times.
Application: widely used in the construction industry, mechanical and electrical industry, highway dark fence, automobile industry, power industry, etc.
DYMAZINC
Steel plant: Nippon steel (Japan)
Coating composition: ZN — 0.2%AI — 0.5%Mg
Date of birth: the same time as the ZAM of Japanese steel.
Introduction: low aluminum and low magnesium composition system, compared with the traditional zinc coating has excellent corrosion resistance, especially suitable for salt hazard areas, corrosion resistance, good processing.
Application: mainly used in construction industry, instead of pure zinc coating.
SUPERDYMA
Steel plant: Nippon steel (Japan)
Coating composition: ZN — 11 %AI — 3%Mg — 0.2%Si
Date of birth: early 21st century (commercially produced after DYMANZIC).
Introduction: high aluminum composition system, super wall corrosion resistance, good formability
Application: mainly used in home appliance industry.
ZM EcoProtect
Steel plant: thyssenkrupp (Germany)
Metal composition: ZN-1%Mg
Date of birth: around 2008.
Description: compared with traditional zinc, aluminum and magnesium coatings, the corrosion resistance is reduced, but it is easy to obtain better surface quality
Application: the alternative product is high surface quality hot dip galvanizing, which is used in electrical cabinets, wheel covers and automotive stamping parts.
Magnelis
Steel plant: ansegentil (Germany)
Coating composition: ZN – 3.5%AI – 3%Mg
Date of birth: 2010.
Description: the purpose of development is mainly for the environment containing cl ions and ammonia gas, which has good resistance to perforation and corrosion under the film.
Application: suitable for animal husbandry, such as raising pigs, cattle and poultry greenhouses.
ZINCALUME
Steel plant: bosco
Coating composition: add about 2% magnesium to aluminum zinc (55% aluminum)
Date of birth: the traditional ZINCALUME has been upgraded in recent years.
Description: strictly speaking, this coating and the original ZAM zinc-aluminum-magnesium coating are two products, which are modified from the traditional zinc-aluminum-zinc coating (55% aluminum)
And then to.
Application: suitable for replacing traditional aluminum and zinc coating.
PosMAC
Steel plant: posco (Korea)
Metal composition: Zn — 2.5%AI — 3%Mg
Date of birth: No
MACSTAG
Steel plant: posco (Korea)
Obsidian: Zn — 1.4%AI — 1.4%Mg
Date of birth: No
JISCO SCS (registered trademark)
Steel plant: jiusteel (China)
Coating composition: Zn — 11%AI — 3%Mg
Date of birth: No.
Baosteel, BZM is close to thyssen’s ZM EcoProtect, and BAM is close to bosco’s ZINCALUME.