The role of non-ideality in H permeation through membranes

Abstract

Non-ideality may be important for H diffusion through metallic membranes at large concentrations. This is easily allowed for if the H concentration in the membrane is nearly constant, but if there is a large gradient, the degree of non-ideality will vary across the membrane. A procedure is given in this paper for the conversion of the measured concentration-dependent diffusion coefficients to the concentration-independent one when there is a significant gradient. © 2006 Acta Materialia Inc.