Hot-Dip 5% Al-Zn Coated/ Zn-Al-Mg Coated Steel Coil (GF/GM)

-Hot-dip 5% Al-Zn coated/ Zn-Al-Mg coated steel coil (GF/GM) are produced by coating the surface of hot-rolled or cold-rolled steel coils with 5% Al-Zn or Zn-Al-Mg coating. This process utilizes the principle of the potential difference between 5% Al-Zn, Zn-Al-Mg and iron to provide corrosion resistance to the steel product. The 5% Al-Zn or Zn-Al-Mg coating acts as sacrificial protection, corroding first to shield the underlying steel or iron. According to the potential difference principle, when two different metals come into contact, the metal with lower potential will corrode faster, while the one with higher potential will be protected.

-Due to the 5% Al-Zn or Zn-Al-Mg coating with sacrificial anode protection mechanism, the product's lifespan is extended, offering excellent characteristics such as weather or corrosion resistance, adhesion, and formability. Additionally, it presents advantages like lower maintenance costs and reduced environmental pollution.