Category Zn-Al-Mg alloy coated (ZM) steel coils

Zn-Al-Mg alloy coated (ZM) steel coils,ZAM steel coil, ZAM, solar bracket

Detail

Hot-dip Zinc-Aluminum-Magnesium alloy coated (ZM) steel coils
(Zn-Al-Mg alloy coated (ZM) steel coils)

OVERVIEW： 
Hot-dip Zn-AL-MG alloy coated steel, also known as ZM steel, is a new type of coating product. 
The zinc-aluminium-magnesium coating is a ternary alloy coating with zinc as the main component, and the content of aluminium and magnesium is between 1.5-8% (among which the magnesium content is not less than 0.2%). 
The magnesium in the coating is beneficial to promoting the formation of a very stable and well-organized and meticulous protective film, 
namely Hydrozincite (（Zn5 (OH)8Cl2 ‧H2O）, which generates and maintains a film-like covering on the surface of the coating, 
thereby ensuring excellent corrosion resistance. Compared with traditional coatings such as GI and Aluzinc, ZM alloy-coated steel is known for its superior corrosion resistance, formality, wear and scratch resistance and can be applied in a wide range of fields  such as automotive, HAVC, solar photovoltaics, agriculture, high-speed guardrails, electrical cabinets, greenhouse structures, etc.

Spec: 6%Alum+3%Mg+Zinc or 11%Alum+3%Mg+Zinc
ZM coating: 40-300g
surface: zero spangle, Cr3 passivated, skin-pass surface
Size range: 0.3-2.5x900-1250mm x c

Features:
1, excellent corrosion resistance (10~20 times than GI with the same coating mass), scratch resistance as well as formability,
2. anti-corrosion mechanism at cutting end face and welding end. 
3. Formability: The coefficient of friction of the ZM coating is 15% lower than that of the GI coating, and it remains stable during reciprocating friction,
 giving it excellent formability.
4, Cost Reduction: An excellent alternative to much more costly materials such as aluminum and stainless steel.

Application:
because of super corrosion resistance, ZM coils in high strength grade like S350GD, S420GD are mainly used to make solar bracket components like C/U profiles.