METHOD FOR PRODUCING A HYDROGEN PRESSURE VESSEL, PRESSURE VESSEL, AND MOTOR VEHICLE HAVING A HYDROGEN PRESSURE VESSEL

The invention relates to a method for producing a hydrogen pressure vessel (1), having the following steps: a) providing a metal vessel (2) having an inner face (3) and an outer face (4); b) forming an oxygen-containing oxide layer (5) on the inner face (3) of the vessel (2) by treating the surface with an oxygen plasma and/or by thermally treating the surface in an oxygen-containing atmosphere; c) coating the oxide layer (5) formed on the inner face (3) of the metal vessel (2) in method step b) with a diffusion barrier (20) in a low-pressure process, in particular at a pressure of 0.1 to 100 Pa, preferably 0.1 to 10 Pa, the diffusion barrier (20) obtained by coating in method step c) being formed either - as an alternating layer structure (21) of at least one stretchable intermediate layer (6) and at least one high density barrier layer (7) or - as a gradient layer (8), the gradient layer (8) having a preferably continuous gradient from a stretchable material to a high density material; d) obtaining the hydrogen pressure vessel (1).