Abstract: A device for cleaning oxidized or corroded components (26), especially gas turbine components which are exposed to hot gases, in the presence of a halogenous gas, includes a cleaning retort which is designed in the shape of a boiler or cylinder and into which, indirectly or directly, leads a feed line which is connected via a flow control unit to a gas reservoir which stores the halogenous gas, and in which a device for gas distribution is integrated. The flow control unit has a gas volume control valve (5), a heat exchanger unit (9), and also a gas volume measuring unit (6) in sequence along the throughflow direction of the halogenous gas which flows through the feed line. Furthermore, a gas distribution in the retort directs the halogenous gas directly to the components which are to be cleaned.