The nucleation in a superheated binary solution is Created as a diffusion p
rocess in the space of three variables of the nucleus, namely, its volume v
and the partial pressures p(1)" and p(2)" of the components. The relief of
the thermodynamic potential surface in the vicinity of the saddle point is
determined, and the description is given of the growth of vapor bubbles in
the solution in view of its viscosity, the rate of evaporation of molecule
s of the solvent and solved substance, and the rate of diffusion feed of su
bstance to the bubble surface. The tensor of generalized diffusion of the n
uclei is calculated, along with the decrement of the rise of the unstable v
ariable and the steady nucleation rate. The theoretical results are compare
d with the experimental data on the superheating of argon-krypton solutions
.