The migration of H in the liquid metal was measured by using quasi-elastic neutron scattering techniques. The diffusivity at 550C was found to be equal to 3.26 x 10-4cm2/s.

Hydrogen Diffusion in Molten Potassium at 550 Degrees C. U.Freudenberg, W.Gläser: Journal of Physics F, 1985, 15[11], L253-5