Effect of Specimen Size on Dissolution of Copper in Molten Tin under Forced Convection

概要

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The effect of diameter of a copper cylinder on the dissolution has been studied at 370 and 480℃ under static and dynamic conditions. The dissolution rate of copper increased with an increasing peripheral velocity of a rotating copper cylinder, U, and the rate decreased with an increasing copper diameter, L, under dynamic conditions. No effect of copper diameter, however, was recognized under static condition. The dissolution rate under dynamic conditions was found to be controlled by mass transfer in the melt, and the mass transfer process was dominated by forced convection. The effect of experimental conditions on the solution rate constant, K, under forced convection was expressed as follows : K=4.616ν^<-0.024>U^<0.34>L^<-0.62>D^<0.644>, where ν is the kinematic viscosity and D is the diffusion coefficient in the melt.
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1980-10-01