The permeation rate was studied by using electrochemical techniques and an aqueous solution, which contained 3.7 x 1012Bq/m3 of T, as a cathodic electrolyte. The T and H were introduced, into one side of the specimen, by cathodic polarization at a constant current density. On the other side, the T and H were removed by potentiostatic ionization. The separation factor for permeation under steady-state conditions was equal to 12 at 288K. This value was independent of the cathodic current density. The diffusion coefficients were deduced from the permeability data by using time-lag techniques. In the case of annealed Fe, the T diffusion coefficient was equal to 9 x 10-10m2/s at 286K, and the value for H was equal to 4 x 10-9m2/s. In the case of 9% cold-worked Fe, the T diffusion coefficient was equal to 3 x 10-10m2/s at 284K, and the value for H was equal to 4 x 10-10m2/s.

H.Hagi, Y.Hayashi: Journal of the Japan Institute of Metals, 1987, 51[7], 591-8