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Reaction between Fe-0.10mass%Si Alloy(s) and Zinc(1)


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Title: Reaction between Fe-0.10mass%Si Alloy(s) and Zinc(1)
Authors: Uchiyama, Yasuo / Koga, Hideto
Issue Date: Jul-1984
Publisher: 長崎大学工学部 / Faculty of Engineering, Nagasaki University
Citation: 長崎大学工学部研究報告, 14(23), pp.197-204; 1984
Abstract: An Fe-0.10mass%Si alloy was immersed in the pure zinc bath for a time up to 6 ks at various temperatures ranging from 713 K to 873 K. The morphology of the alloy layer was observed, and the thickness of the alloy layer and the quantities of iron having reacted with zinc were measured. The total thickness of the alloy layer formed at temperatures ranging from 713 K to 753 K is thicker than that of one formed at higher temperatures. The temperature dependence of the quantity of iron remaining in the alloy layer is similar to that of the total thickness of the alloy layer. An iron mass loss is greater in the temperature range from 713 K to 753 K, and above 813 K, it increases with the immersion temperature. To obtain information on the silicon reactivity in hot dip galvanizing, the results obtained for the Fe-0.10mass%Si alloy were compared with those obtained for pure iron under the same conditions used in this study. The addition of 0.10mass% Si influences the Fe-Zn reaction in the temperature range from 713 K to 753 K. The alloy layer formed in this temperature range comprises a gamma layer, a delta 1 layer, and a zeta layer. The zeta layer formed in this temperature range is a (zeta+eta) mixture layer, and is composed of granular or columnar zeta crystals. The growth of the zeta layer obeys the linear time law, disobeying the diffusion controlled process. The delta 1 layer formed in the temperature range from 713 K to 753 K is constant. This causes the growth of the zeta layer to obey the linear time law. The rapid reaction between the Fe-0.10mass%Si alloy and liquid zinc in the vicinity of 713 K is the effect of added silicon that allows the formation of the (zeta+eta) mixture layer.
URI: http://hdl.handle.net/10069/24169
ISSN: 02860902
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:Volume 14, No. 23

Citable URI : http://hdl.handle.net/10069/24169

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