Anti-Corrosion Performance And Applications Of Posmac (R) Steel

PosMAC (R) is a brand of Zn-Mg-Al hot-dip coated steel sheet developed by POSCO. PosMAC (R) can form dense surface oxides in corrosive environments, providing advanced corrosion resistance compared to traditional Zn coatings such as GI and GA. PosMAC (R) 3.0 is available for construction and solar energy systems in severe outdoor environments. PosMAC (R) 1.5 has better surface quality. It is suitable for automotive and home appliances. Compared to GI and GA, PosMAC (R) shows significantly less weight reduction due to corrosion, even with a lower coating thickness. Thin coating of PosMAC (R) provides advanced quality and productivity in arc welding applications due to its less generation of Zn fume and spatters. In repeated friction tests, PosMAC (R) showed lower surface friction coefficient than conventional coatings such as GA, GI, and lubricant film coated GA. Industrial demand for PosMAC (R) steel is expected to increase in the near future due to benefits of anti-corrosion and robust application performance of PosMAC (R) steel.