Hostname: page-component-8448b6f56d-tj2md Total loading time: 0 Render date: 2024-04-23T07:57:28.171Z Has data issue: false hasContentIssue false
  • English
  • Français

Quantitative analysis of top dross formation mechanism in metal coating baths

Published online by Cambridge University Press:  13 December 2013

N. Setargew  and
W.Y.D. Yuen
Get access

Abstract

Simulation experiments were conducted to identify the dominant factors that affect top dross generation in metal coating baths. From the experiments and the microstructural analyses of the top dross, it is proposed that top dross is generated through bath metal entrainment by the oxide film and subsequent drainage during holding. A new concept, taking into consideration the fresh area creation during the wiping process, is introduced and a mathematical model is developed to quantify dross generation in the metal coating process. From the proposed mechanism, a new metric is developed to quantify top dross generation in the coating bath. The experimental results agree well with both theoretical results and production data of galvanising (GI) baths based on this metric.

Keywords

Top drosstop dross microstructurestagnation lineoxide stringersentrained bath metaldrainage
Type
Research Article
Information
Metallurgical Research & Technology , Volume 110 , Issue 5 , 2013 , pp. 349 - 357
Copyright
© EDP Sciences 2013

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

F. Ajersch, C.K. Koutsaris, F. Ilinca, F.E. Goodwin, Numerical and Experimental Analyses of Dross Generation in Continuous Galvanizing Operations, Galvanizers Association Proc., 2011
M. Dubois, Top Dross the Undocumented Gold Mine, Galvanizers Association Proc., 2003
R. Thiounn, R. Zanfack, H. Saint-Raymond, P. Durighello, Understanding Hot-Dip Galvanizing Skimmings, Galvanizers Association Proc., 100th Meeting, 2008
M. Bright, S. Ellis, Minimizing Zinc Consumption in Hot-Dip Galvanizing Lines, Asia Pacific Galvanizing Conference, 2009
C.V. Tu, C.H. Ellen, Stability of Liquid Coating in the Jet Stripping Process, 9th Australian Fluid Mechanics Conference, Auckland, 1986
W.B. Pietsch, Proc. Intl. Symp., 1985, pp. 683–699, Florida, The Met Soc of AIME
J.R. Terril et al., Welding J, 1971, pp. 833-9
B. McGurran, M.G. Nickolas, Welding research Supplement, 1984, pp. 290-5
J. Campbell, Castings, 2nd Edition. Oxford: Elsevier, Butterworth-Heinemann, 2006