The kinetics of H evolution and absorption on oxidized and unoxidized Al, and the dependence of the gas-evolution coefficient upon temperature, were determined at 450, 520, 550 and 600C. The diffusion behavior could be described by:

D (cm2/s) = 0.12 exp[-14.5(kcal/g-atom)/RT]

L.A.Andreev, A.F.Vyatkin, B.V.Levchuk, V.I.Telkov, A.L.Rabinovich: Izvestiya Vysshikh Uchebnykh Zavedenii (Tsvet. Met.), 1975, 5, 123-8