Abstract
The rates of solution of a still-standing and a rotated steel bar in liquid zinc were measured in the range from 550°C to 600°C. In addition, diffusion coefficients of iron were estimated from this study because no experimental values of diffusion coefficients are available in the existing literatures.The results obtained are as follows:(1) Arrhenius relation is satisfied in the relation between the rate of solution and temperature. The activation energy for solution, Ev, is given by Ev=ED+Es+Eη/2 where ED and EηAare the activation energy for diffusion and the viscosity of liquid metal and Es is the heat of solution.(2) The relation between the rate of solution, V, and the speed of rotation of steel bar, U, is given by V=kU0.64, where k is constant.(3) On the basis of boundary layer theory, it was found that the dissolution of steel in molten zinc was a liquid diffusion-controlled process.
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