Zinc-aluminum-magnesium coil coating composition is mainly composed of zinc, aluminum and magnesium, the main component is zinc, followed by 1%-6% aluminum and 1.5-3% magnesium and trace silicon composition (different manufacturers have slightly different proportions), compared with other coating products have excellent notch protection performance.

Aluminum content of aluminum in aluminum-magnesium-zinc coating is 55%. Aluminum-magnesium- zinc is formed by adding certain magnesium (about 2%) and other elements on the basis of aluminum zinc. It is an upgraded version of corrosion resistance of the hot dip aluminum zinc steel coil.