Intermetallic Phases Formation in Hot Dip Galvanizing Process

Abstract:

The study describes the mechanism of structure formation in protective coating, growing on iron surface during hot-dip galvanizing. As a first stage of the galvanizing process, immediately after the iron sample has been dipped in galvanizing bath, a layer of frozen zinc is crystallizing on the sample surface. Next, as a result of isothermal solidification, an alloyed layer of the coating; composed of the sub-layers of intermetallic Fe-Zn phases, is formed. At the initial stage of the existence of the alloyed layer, another layer, that of undercooled liquid, is formed on the surface of iron dipped in liquid zinc. As a result of peritectic reactions under metastable conditions, the individual phases are born, forming sub-layers in the expected sequence of Γ1, δ and ζ.

• Periodical: Solid State Phenomena (Volume 197)
• Pages: 77-82
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.197.77
• Online since: February 2013
• Authors: Dariusz Kopyciński, Edward Guzik
• Keywords: Flux, Hot-Dip Galvanizing, Intermetallic Fe-Zn Phases, Kinetics of Zinc Coating Growth, Peritectic Phases, Zinc Coating

References

[1] C.E. Jordan, A.R. Marder, Effect of substrate grain size on iron – zinc reaction kinetics during hot-dip galvanizing, Metall. Mater. Trans. 28A (1997) 2683-2694.

DOI: 10.1007/s11661-997-0025-6

[2] C.E. Jordan, A.R. Marder, Effect of phosphorus surface segregation on iron-zinc reaction kinetics during hot-dip galvanizing, Metall. Mater. Trans. 28A (1997) 2695-2703.

DOI: 10.1007/s11661-997-0026-5

[3] A.R. Marder, The metallurgy of zinc-coated steel, Prog. Mater. Sci. 45 (2000) 191-271.

[4] P. Maass, P. Peissker, Hot-dip galvanizing. Publishing Agency – Placet, Warsaw, (1998).

[5] J. Strutzenberger, J. Faderl, Solidification and spangle formation of hot-dip galvanized zinc coatings, Metall. Mater. Trans. 28A (1998) 631-642.

DOI: 10.1007/s11661-998-0144-8

[6] R. Parisot, S. Forest, A. Pineau, F. Grillon, X. Demonet, J.M. Mataigne, Deformation and Damage Mechanisms of Zinc Coatings on Hot-Dip Galvanized Steel Sheets, Metall. Mater. Trans. 35A (2004) 797-805.

DOI: 10.1007/s11661-004-0007-x

[7] A. Quiroga, S. Claessens, B. Gay, M. Rappaz, A novel experiment for the study of substrate-induced nucleation in metallic alloys, Metall. Mater. Trans. 35A (2004) 3543-3550.

DOI: 10.1007/s11661-004-0191-8

[8] J. Mackowiak, N.R. Short, Metallurgy of galvanized coating, Int. Met. Rev. 1 (1979) 1-19.

[9] J.D. Culcasi, P.R. Sere, C.I. Elsner, A.R. Sarli, Control of the growth of zinc –iron phases in the hot-dip galvanizing process, Surf. Coat. Tech. 122 (1999) 21-23.

DOI: 10.1016/s0257-8972(99)00404-1

[10] Y. De Abreu, A. Silva, A. Ruiz, R. Requiz, N. Angulo, R. Alanis, Study of zinc coatings on steel substrate attained by two different techniques. Surf. Coat. Tech. 120-121 (1999) 682-686.

DOI: 10.1016/s0257-8972(99)00358-8

[11] W. Wołczyński, E. Guzik, J. Janczak-Rusch, D. Kopyciński, J. Golczewski, H. Mo Lee, J. Kloch, Morphological characteristics of multi-layer/substrate systems, Mater. Charact. 56 (2006) 274-280.

DOI: 10.1016/j.matchar.2005.11.004

[12] D. Kopyciński, E. Guzik, W. Wołczyński, The zinc coating solidification on surface silicon steels and DI castings, Inżynieria Materiałowa, Sigma Not Ed. 3 (2010) 328-331.