Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of Annealed Oxides on the Formation of Inhibition Layer During Hot-Dip Galvanizing of 590Mpa Trip Steel

  • Kim, Seong-Hwan (Department of Materials Science and Engineering, Korea University) ;
  • Huh, Joo-Youl (Department of Materials Science and Engineering, Korea University) ;
  • Lee, Suk-Kyu (POSCO Technical Research Laboratories) ;
  • Park, Rho-Bum (POSCO Technical Research Laboratories) ;
  • Kim, Jong-Sang (POSCO Technical Research Laboratories)
  • Received : 2009.09.17
  • Accepted : 2011.01.06
  • Published : 2011.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

The selective surface oxidation of a transformation-induced-plasticity (TRIP) steel containing 1.6 wt.% Mn and 1.5 wt.% Si during annealing at $800^{\circ}C$ was investigated for its influence on the formation of an inhibition layer during hot-dip galvanizing. The selective oxidation of the alloying elements and the oxide morphology were significantly influenced by the annealing atmosphere. The pure $N_{2}$ atmosphere with a dew point $-40^{\circ}C$ promoted the selective oxidation of Mn as a crystalline $Mn_{2}SiO_{4}$ phase, whereas the $N_{2}$ + 10% $H_{2}$ atmosphere with the same dew point $-40^{\circ}C$ promoted the selective oxidation of Si as an amorphous Si-rich oxide phase. During hot-dip galvanizing, the $Mn_{2}SiO_{4}$ phase was reduced more readily by Al in the Zn bath than the Si-rich oxide phase. Consequently, the pure $N_{2}$ atmosphere resulted in a higher formation rate of $Fe_{2}Al_{5}$ particles at the Zn/steel interface and better galvanizability than the $N_{2}$ + 10% $H_{2}$ atmosphere.

Keywords

References

  1. A.R. Marder, Prog. Mater. Sci., 45, 191 (2000). https://doi.org/10.1016/S0079-6425(98)00006-1
  2. J. Mahieu, S. Claessens, and B.C. De Cooman, Metall. Mater. Trans. A, 32A, 2095 (2001).
  3. P. Drillet, Z. Zermout, D. Bouleau, J. Mataigne, and S. Claessens, Galvatech '04 Proceedings, Chicago, USA, p. 1123 (2004).
  4. E.M. Bellhouse, A.I.M. Mertens, and J.R. McDermid, Mater. Sci. Eng. A, 463, 147 (2007). https://doi.org/10.1016/j.msea.2006.09.117
  5. E. Girault, A, Mertens, P. Jacques, Y. Houbaert, B. Verlinden, and J. Van Humbeeck, Scripta Mater., 44, 885 (2001). https://doi.org/10.1016/S1359-6462(00)00697-7
  6. S. Swaminathan and M. Spiegel, Appl. Surf. Sci., 253, 4608 (2007).
  7. N. Gao, Y.H. Liu, and N.Y. Tang, MS&T 2008 Proceedings, Pittsburgh, p. 1417 (2008).
  8. S. Swaminathan, T. Koll, M. Pohl, and M. Spiegel, Galvatech '07 Proceedings, Osaka, Japan, p. 460 (2007).
  9. H.J. Lee and J.S. Kim, J. Mater. Sci. Lett., 20, 955 (2001). https://doi.org/10.1023/A:1010953505679
  10. T. Van De Putte, D. Loison, S. Claessens, Z. Zermout, and J. Penning, Galvatech'07 Proceedings, Osaka, Japan, p. 415 (2007).
  11. T. Yasui, M. Nakazawa, and A. Miyasaka, Galvatech'07 Proceedings, Osaka, Japan, p. 493 (2007).