The diffusive behavior of H was studied at 300 to 370C. The results could be described by:

D (cm2/s) = 3.5 x 10-3 exp[-0.44(eV)/kT]

S.Scherrer, G.Lozes, B.Deviot: Comptes Rendus de l’Academie des Sciences – B, 1967, 264[22], 1499-502