Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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New Corrosion-Resistant Zn-Al-Mg Alloy Hot-Dip Galvanized Steel Sheet

  • Kohei Tokuda (Nippon Steel Corporation Technical Research & Development Bureau Setouchi R&D Lab.) ;
  • Yasuto Goto (Nippon Steel Corporation Technical Research & Development Bureau Setouchi R&D Lab.) ;
  • Mamoru Saito (Nippon Steel Corporation Technical Research & Development Bureau R&D Lab.) ;
  • Hiroshi Takebayashi (Nippon Steel Corporation Technical Research & Development Bureau R&D Lab.) ;
  • Takeshi Konishi (Nippon Steel Corporation Technical Research & Development Bureau R&D Lab.) ;
  • Yuto Fukuda (Nippon Steel Corporation Setouchi Works) ;
  • Fumiaki Nakamura (Nippon Steel Corporation Flat Products Marketing Div.) ;
  • Koji Kawanishi (Nippon Steel Corporation Flat Products Marketing Div.) ;
  • Kohei Ueda (Nippon Steel Corporation Technical Research & Development Bureau R&D Lab.) ;
  • Hidetoshi Shindo (Nippon Steel Corporation Setouchi Works)
  • Received : 2024.01.25
  • Accepted : 2024.03.27
  • Published : 2024.04.30
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Abstract

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.

Keywords

References

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