A study was made of the permeation and diffusion of H (table 10) by monitoring the rate of H permeation through a liquid Al bath using manometric measurements. The diffusion coefficients were calculated from the time lag which was required in order to attain a steady state diffusion. At temperatures of between 943 and 1258K, the results could be summarised by:

P (cm2/s atm½) = 3.86 exp[-23.9(kcal/g-atom)/RT]

D (cm2/s) = 2.34 exp[-15.0(kcal/g-atom)/RT]

K.I.Vashchenko, D.F.Chernega, G.A.Remizov, O.M.Byalik: Izvestiya Vysshikh Uchebnykh Zavedenii (Tsvet. Met.), 1972, 15[1], 50-6

Table 10

Permeation and Diffusivity of H in Liquid Al