Numerical modelling of hydrogen desorption from cylindrical surface

We consider degassing of cylindrical sample containing dissolved hydrogen. The experiment is made by the thermodesorption method. In the corresponding boundary-value problem with nonlinear dynamic boundary conditions physical–chemical processes in the bulk and on the metal surface are taken into account: diffusion, desorption, solution, and capture by defects. Computational algorithm for desorption flux modelling is developed on the basis of difference approximations. The results of numerical modelling are presented.