The invention relates to a method for calibrating a device (1) and / or a method (T) for thermal spraying, in which a stream of a carrier gas (21) is loaded with an essentially powdery additive (11) and used as a spraying gas stream (31) and in which a Coriolis mass flow measuring device (50) is used to characterize the spray gas flow (31). The method has the steps: (S1) providing a time-constant volume flow of the carrier gas (21) at a predetermined volume flow value, (S2) providing the aggregate, (S3) loading the carrier gas (21) with the aggregate (11) with a predetermined one constant loading rate and thereby generating a spray gas flow (31), (S4) flowing through the Coriolis mass flow measuring device (50) operated via a corresponding excitation current with a predetermined amplitude with the spray gas flow (31), (S5) adjusting an excitation current of the Coriolis mass flow measuring device (50) such that the amplitude of the Coriolis mass flow measuring device (50) remains constant in comparison to an unflowed state or a state with a flow through with the unloaded carrier gas (20), and detecting a value of the excitation current, (S6) determining the mass of additive (11) in the spray gas stream (31) for a given calibration period and detecting a value of the mass and (S7) providing the value of the excitation current and the value of the mass of aggregate (11) as a pair of values. Steps S3 to S7 are carried out for a plurality of values of constant loading rates. The present invention further relates to a method for thermal spraying, a control device (100) and a device (1) for thermal spraying.
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