New Corrosion-Resistant Zn-Al-Mg Alloy Hot-Dip Galvanized Steel Sheet
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
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.
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.
참고문헌 (8)
- Y. Hisamatsu, "History of Hot-Dip Galvanized Sheet in Japan", The Journal of the Metal Finishing Society of Japan, 34, pp.354~ (1983)[DOI]
- A. Komatsu, "Corrosion Resistance and Protection Mechanism of Hot-dip Zn-Al-Mg-Alloy Coated Steel Sheet under Accelerated Corrosion Environment", Tetsu-to-Hagané, 86, pp.534~ (2000)[DOI]
- Y. Morimoto, "The Corrosion Resistance of Zn-11% Al-3% Mg-0.2% Si Hot-dip Galvanized Steel Sheet", Tetsu-to-Hagané, 89, pp.161~ (2003)[DOI]
- K. Tokuda, "New Corrosion Resistant Coated Steel “ZEXEED™”", NIPPON STEEL TECHNICAL REPORT, 129, pp.63~ (2023)
- T. Mitsunobu, "Peritectic Structure Evolution in Hot-dip Zn-Al Alloy Coatings", Tetsuto-Hagané, 106, pp.254~ (2020)[DOI]
- W. Yamada, "Solidification Structure of Coating Layer in Hot-dip Zn-11% Al-3% Mg-0.2% Si-coated Steel Sheet and Phase Diagram of the System", NIPPON STEEL TECHNICAL REPORT, 102, pp.37~ (2013)
- H. Hamada, "Aenkei Fushoku Seiseibutu no Seisei Kikou", Rust prevention & control, 38, pp.453~ (1994)
- K. Ueda, "Investigation of corrosion resistance of pre-painted Zn-11% Al-3% Mg-0.2%Si alloy coated steel sheet through outdoor exposure test in Okinawa", La Metallurgia Italiana, 104, pp.13~ (2012)