Corrosion Science and Technology

  • 제23권4호
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  • Pages.289-295
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  • 2024
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  • 1598-6462(pISSN)
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  • 2288-6524(eISSN)
한국부식방식학회 (The Corrosion Science Society of Korea)
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Characteristics of Hot-Dip Znmgal Coatings with Ultra-High Corrosion Resistance

  • 투고 : 2024.01.11
  • 심사 : 2024.06.23
  • 발행 : 2024.08.30
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초록

Zn-Mg-Al alloy hot-dip galvanized steel sheet has high corrosion resistance. Compared to conventional Zn coating with the same coating thickness, the high corrosion resistance Zn-Mg-Al coating is more corrosion-resistant. Various coating compositions are commercially produced and applied in diverse fields. However, these steel sheets typically contain up to 3 wt% magnesium. In recent years, there has been a growing demand for higher corrosion resistance in harsh corrosive environments. Therefore, variations in Mg and Al contents were investigated while evaluating primary properties and performance. As a result, we developed new alloy-coated steel with ultra-high corrosion resistance. A Zn-5 wt%Mg-Al coated steel sheet was evaluated for its corrosion resistance and various properties. As the amount of Mg added increased, the corrosion loss tended to decrease. The corrosion resistance of the coated steel sheet in a particular composition, the Zn-5 wt%Mg-Al coating sheet, was about 1.5 to 2 times higher than that of the conventional Zn-3 wt%Mg-Al coating sheet. Ultimately, this ultra-high corrosion-resistance coated steel sheet will provide a robust solution to conserve Zn resources and contribute to a low-carbon society.

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참고문헌

  1. M-S. Oh and J. S. Kim, Proc. Galvatech 2015, p. 201, Toronto, Canada (2015).
  2. I. R. Sohn, T. C. Kim, G. I. Ju, M. S. Kim, and J. S. Kim, Anti-Corrosion Performance and Applications of PosMAC® Steel, Corrosion Science and Technology, 20, 7 (2021). Doi: https://doi.org/10.14773/cst.2021.20.1.7
  3. I. R. Sohn, T. C. Kim, G. I. Ju, M. S. Kim, and J. S. Kim, Development of PosMAC® Steel and Its Application Properties, Korean Journal of Metals and Materials, 59, 613 (2021). Doi: http://dx.doi.org/10.3365/KJMM.2021.59.9.613
  4. N. C. Hosking, M. A. Strom, P. H. Shipway, and C. D. Rudd, Corrosion resistance of zinc-magnesium coated steel, Corrosion Science, 49, 3669 (2007). Doi: https://doi.org/10.1016/j.corsci.2007.03.032
  5. Qing Qu, Chuanwei Yan, Ye Wan, and Chunan Cao, Effects of NaCl and SO2 on the initial atmospheric corrosion of zinc, Corrosion Science, 44, 2789 (2002). Doi: https://doi.org/10.1016/S0010-938X(02)00076-8
  6. P. Volovitch, T. N. Vu, C. Allely, A. Abdel Aal, and K. Ogle, Understanding corrosion via corrosion product characterization: II. Role of alloying elements in improving the corrosion resistance of Zn-Al-Mg coatings on steel, Corrosion Science, 53, 2437 (2011). Doi: https://doi.org/10.1016/j.corsci.2011.03.016
  7. T. Prosek, A. Nazarov, U. Bexell, D. Thierry, and J. Serak, Corrosion mechanism of model zinc-magnesium alloys in atmospheric conditions, Corrosion Science, 50, 2216 (2008). Doi: https://doi.org/10.1016/j.corsci.2008.06.008
  8. T. Truglas, J. Duchoslav, C. Riener, M. Arndt, C. Commenda, D. Stifter, G. Angeli, and H. Groiss, Correlative characterization of Zn-Al-Mg coatings by electron microscopy and FIB tomography, Materials Characterization, 166, 110407 (2020). Doi: https://doi.org/10.1016/j.matchar.2020.110407
  9. J. W. Lee, B. R. Park, S. Y. Oh, D. W. Yun, J. K. Hwang, M. S. Oh, and S. J. Kim, Mechanistic study on the cut-edge corrosion behaviors of Zn-Al-Mg alloy coated steel sheets in chloride containing environments, Corrosion Science, 160, 108170 (2019). Doi: https://doi.org/10.1016/j.corsci.2019.108170
  10. H. C. Shih, J. W. Hsu, C. N. Sun, and S. C. Chung, The lifetime assessment of hot-dip 5% Al-Zn coatings in chloride environments, Surface and Coatings Technology, 150, 70 (2002). Doi: https://doi.org/10.1016/S0257-8972(01)01508-0