| abstract |
Composite tank for the storage of hydrogen under pressure comprising an inner casing (2) of impervious plastic material and an outer casing (3) of mechanical reinforcement made of composite material arranged around at least a part of the inner casing (2) , the tank (1) comprising a gas evacuation structure (4) capable of diffusing through the inner casing (2), characterized in that the evacuation structure comprises at least one layer (4) of material drainant having a selective permeability for hydrogen, said layer (4) of draining material being disposed in the thickness of the tank and having an end (14) flush with the outer surface of the tank (1 |