Reactive diffusion between solid Fe and liquid Zn at 723 K

Ryosuke Kainuma, Kiyohito Ishida

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19 Citations (Scopus)


Reactive diffusion between solid Fe and liquid Zn was experimentally examined using Fe/Zn diffusion couples prepared by an immersion technique. Using this technique, a pure iron sheet was immersed in a molten pure Zn bath with a constant temperature of T= 723 K (450°C) for various times up to t=7.2×103 s (2 h). The microstructure of the cross section of the Fe/Zn diffusion couple was observed by scanning electron microscopy, and the chemical composition of each phase was determined by electron probe microanalysis. Interface concentrations of Fe for the ζ-FeZn13 and δ-FeZn7-10 phases at the ζ;/δ interface, c ζδ and cδζ. and for the liquid-Zn (L) phase at the ζ/L interface, c, determined from the diffusion couples were found to be extremely higher than the corresponding equilibrium values, especially in the early stage of t<300 s, and the difference gradually decreased during immersion. The deviations from the equilibrium values for the cζδ and c were proportional to the interdiffusion flux across the ζ phase layer.

Original languageEnglish
Pages (from-to)741-744
Number of pages4
JournalISIJ International
Issue number5
Publication statusPublished - 2007


  • Diffusion
  • Galvanizing
  • Interface
  • Phase diagram


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