Аннотация:This work reported about the observation of changes in the surface morphology of membrane filters of Pd95Pb5 alloy, when they are hydrogenated from a gas medium.The predisposition of the alloy to cavitation during the manufacture of a membrane filter and its reversible doping with hydrogen is revealed and confirmed.A decrease in the degree of surface roughness is established as a result of reversible hydrogen doping, which can affect the hydrogen permeability of diffusion filter membranes.The practical significance of this study is the development of technologies for the diffusion separation of high-purity hydrogen.