Metal fusion bonding – Process – With pretreating other than heating or cooling of work part...
Patent
1998-11-06
2000-08-22
Ryan, Patrick
Metal fusion bonding
Process
With pretreating other than heating or cooling of work part...
228223, 22826251, C23C 212, B23K 120
Patent
active
061058505
ABSTRACT:
A method of avoiding generation of waste water while brazing components made of aluminium or an aluminium alloy using a flux, especially a flux composed of an aqueous suspension of potassium fluoroaluminate. Since used suspension is replaced with fresh suspension after a given period of time and the apparatus regularly have to be cleaned, waste water is produced which contains flux, e.g. potassium fluoroaluminate. In the past, such waste water has been discharged into the environment. It has now been discovered that such waste water can be recycled to the brazing process after separation of the flux. In this manner, the production of waste water can be largely avoided. Since surfactants are frequently used, and these are likewise recirculated, a corresponding saving in terms of surfactant is possible. Furthermore, the environment is protected correspondingly.
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Lauzon Daniel Clement
Schwarze Thomas
Johnson Jonathan
Ryan Patrick
Solvay Fluor und Derivate GmbH
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