The diffusion of H was investigated at 260 to 1000K by using electrochemical permeation and gas-phase permeation techniques. The temperature dependence of the diffusivity could be described by:

D (cm2/s) = 9.2 x 10-3 exp[-9.9(kcal/mol)/RT]

H.Hagi: Journal of the Japan Institute of Metals, 1983, 47[12], 1029-35