Hot-dip zinc-coated
Superior corrosion resistance
In terms of corrosion resistance, ZAM® is
10 to 20 times better than hot-dip zinc-coated steel sheets*1 and
5 to 8 times better than hot-dip zinc-5%aluminum alloy coated steel sheets*2.
Excellent corrosion resistance is achieved on cut edge of ZAM®
with a fine zinc-based protective film that contains Al and
Mg leaching from the coating layer.
*1, *2: Estimated by salt spray test
Comparison of corrosion resistance of flat sections
Hot-dip zinc-coated
After 2,500 hours of salt spray test, the surface appearances of the samples were compared (coating weight: 90/90 g/m2).
Corrosion mechanisms of flat sections
Cut edge
Excellent corrosion resistance is achieved on cut edge of ZAM® with a fine zinc-based protective film that contains Al and Mg leaching from the coating layer.
Initial exposure period
3 years after exposure
(Plate thickness; 3.2 mm)