The rate of absorption of H was measured by using steady-state and unsteady-state gas-liquid metal diffusion cell techniques. The absorption process was considered to be diffusion-controlled. The data for temperatures ranging from 1103 to 1433C fitted:

D (cm2/s) = 1.091 x 10-2 exp[-2.148(kcal/mol)/RT]

The Diffusion of Hydrogen in Liquid Ni, Cu, Ag, and Sn. E.M.Sacris, N.A.D.Parlee: Metallurgical Transactions, 1970, 1[12], 3377-82

Table 19

Parameters for H Diffusion in Cu, Fe and Ni