Hello you all!
This time, I'm just looking for reliable data for hydrogen diffusion in tungsten, in mm thickness, at some 2400 to 3000K. Preferably in units of permeance (flow per surface and pressure) rather than diffusion coefficients (cm2/s), or I would need a conversion between gas pressure and gas density in the metal.
Measurements were done half a century ago, at pre-Internet times. More recent measures are more specialized (2µm W on Pd... 1H to 2H segregation...). Not found any free doc on the Web.