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New Corrosion-Resistant Zn-Al-Mg Alloy Hot-Dip Galvanized Steel Sheet
( Kohei Tokuda ),( Yasuto Goto ),( Mamoru Saito ),( Hiroshi Takebayashi ),( Takeshi Konishi ),( Yuto Fukuda ),( Fumiaki Nakamura ),( Koji Kawanishi ),( Kohei Ueda ),( Hidetoshi Shindo ) 한국부식방식학회 2024 Corrosion Science and Technology Vol.23 No.2
In recent years, Zn-Al-Mg alloy galvanized steel sheets have been widely used as coated steel sheets to support social capital in the infrastructure field. A feature of Zn-Al-Mg alloy-coated steel sheets is that they provide a better corrosion protection period than Zn-coated steel sheets. In this study, the corrosion resistance of a new Zn-Al-Mg alloy-coated steel sheet was investigated and compared to that of conventional commercially available coated steel sheets. The investigation confirmed that increasing the Mg concentration in the Zn-Al-Mg-coated steel sheet improved corrosion resistance, which was more than 10 times that of the galvanized steel sheet specified in JIS G 3302. The study findings also confirmed that the corrosion resistance reached more than twice that of the coated steel sheet specified in JIS G 3323. If such galvanized steel sheets are applied to social infrastructures that are exposed to severely corrosive environments, the service life of the infrastructure might be extended.