The flow of H through the stainless steel was markedly affected by surface reactions. Pressure-modulation methods indicated that the diffusivity could be described by:

D (m2/s) = 1.22 x 10-6 exp[-6600/T(K)]

D.M.Grant, D.L.Cummings, D.A.Blackburn: Journal of Nuclear Materials, 1987, 149, 180-91