The diffusion of H through molten Cu was studied by using a capillary method in which precautions were taken to eliminate convection currents and so-called boiling of the Cu surface. The measurements were carried out in an atmosphere of pure Ar. It was found that the activation energy for permeation was equal to 19.5kcal/mol for temperatures of between 1100 and 1250C, and that the diffusivity obeyed:

D (cm2/s) = 1.46 x 10-2 exp[-4.5(kcal/mol)/RT]

D.F.Chernega, K.I.Vashchenko, D.F.Ivanchuk: Izvest. V.U.Z. Tsvetnaya Met., 1973, 4, 120-2