The diffusivity of H was measured at 280 to 360K by using electrochemical techniques. The results could be described by:

D (cm2/s) = 2.89 x 10-3 exp[-5.3(kcal/mol)/RT]

M.Yoshihara, R.B.McLellan: Acta Metallurgica, 1986, 34[7], 1359-66