The diffusion of H was studied at 1550 to 1680C. The results could be described by:

D (cm2/s) = 4.37 x 10-3 exp[-4.13(kcal/mol)/RT]

P.J.Depuydt, N.A.D.Parlee: Metallurgical Transactions, 1972, 3[2], 525-32