An apparatus was described for measuring the passage of H through metals under low-temperature plasma conditions. For a specimen of Armco Fe, with a thickness of 1.05mm, the diffusivity at temperatures of 40 to 85C was found to be given by:

D (cm2/s) = 1.7 x 104 exp[-2.9(kcal/mol)/RT]

V.E.Volkov, R.A.Ryabov, P.V.Geld, G.D.Fedorov: Izvestiya Vysshikh Uchebnykh Zavedenii (Fizika), 1972, 127-8