Anti-Corrosion Performance and Applications of PosMAC ® Steel

• Published in: Corrosion science and technology Vol. 20; no. 1; pp. 7 - 14
• Main Authors: Sohn, Il-Ryoung, Kim, Tae-Chul, Ju, Gwang-Il, Kim, Myung-Soo, Kim, Jong-Sang
• Format: Journal Article
• Language: Korean
• Published: 한국부식방식학회 28.02.2021
• Subjects: 0; 5; Anti-corrosion; PosMAC ®</ sup>1; PosMAC ®</ sup>3; Zn-Mg-Al alloy coating; 0; PosMAC^{(R)}$1; Anti-corrosion; Zn-Mg-Al alloy coating; 5; PosMAC^{(R)}$3
• ISSN: 1598-6462

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