Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Growth Kinetics of Intermediate Phases in Hot Dip Galvanizing
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1982 Volume 68 Issue 13 Pages 1808-1812


The previous experimental results on the formation and growth kinetics of intermediate phases in reaction between solid iron and solid or liquid zinc at various temperatures have been investigated in more details. In a function of temperature T(K) and time t(min) A(T, t) = T (logt +16.7), beginning times of characteristic formation and growth processes of the intermediate phases are constant irrespective of reaction temperature and whether zinc is solid or liquid. Irrespective of temperature and zinc state, phase growth curves using A (T, t) instead of t represent the almost similar shapes which change with occurences of the above characteristic processes. The relation W = ktn shown in many previous papers has roughly been obtained in this study, where W is thickness of intermediate phases and t is reaction time in hot dip galvanizing. Difference in values of the exponent n among investigators seems to be due to differences in their experimental temperatures and times. Since the phase growth curves do not correctly obey the relation W = ktn using a single n value, rate determining process in hot dip galvanizing reaction should be discussed from another standpoints.

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© The Iron and Steel Institute of Japan
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