The permeability and diffusivity of H in the stainless steel were measured by using a gaseous permeation technique at between 200 and 430C. The results indicated that the permeability and diffusivity obeyed Arrhenius relationships:

D (m2/s)  = 4.61 x 10-7 exp[-53.79(kJ/mol)/RT]

and were not affected by cold-working or heat-treatment. The values were affected by the alloy composition.

X.Sun, J.Xu, Y.Li: Materials Science and Engineering, 1989, A114, 179-87