Abstract
The effect of immersion temperature on the reaction between Fe-Si alloys and liquid zinc was studied to obtain information about the effect of Si on the Fe-Zn reaction. Seven Fe-Si alloys with different Si concentrations (0.10∼2.84 mass%) were immersed in pure molten zinc for 600 s in the temperature range of 713∼873 K. The results obtained are as follows:(1) The δ1 layer is formed next to the Γ layer. The type of alloy layer formed next to the δ1 layer depends on the Si concentration and immersion temperature.(2) The reaction between iron and zinc proceeds rapidly for the Fe-0.10%Si alloy at 713 K and for the Fe-1.15%Si alloy at 793 K.(3) An addition of 0.10%Si affects the formation and growth of the ζ layer, and an addition of about 1.15%Si affects the growth of the (δ1+η) layer.(4) The reaction between iron and zinc at temperatures above 813 K does not depend on the Si concentration in the Fe-Si alloys.
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