The diffusion of H was studied at 1478 to 1600C. The results could be described by:

D (cm2/s) = 7.47 x 10-3 exp[-8.55(kcal/mol)/RT]

E.M.Sacris, N.A.D.Parlee: Metallurgical Transactions, 1970, 1[12], 3377-82