Method for dry fluxing a metal surface prior to soldering or tinning using an atmosphere containing water vapor

摘要

Dry fluxing at least one metal surface on a component, prior to brazing or tinning with an alloy comprises: (a) passing an initial gas mixt. (7), comprising an inert gas and/or a reducing gas and incorporating an oxidising gas mixt. including water vapour, into at least one appts. (11,4,12) for formation of excited or unstable gaseous species in order to produce, after transformation in this appts, at the outlet (6) of the appts. a prim. gas mixt. (8), the water vapour content of the initial gas mixt. being within a range of 50 ppm to 6%; and (b) treating the surface to be fluxed at a pressure close to that of atmospheric pressure, with a gaseous treatment atmos. made up of the excited or unstable gas species and essentially devoid of any electrically charged species, obtd. from the prim. gas mixt.