Polymer-based material for carbon deposition during brazing oper

Details Polymer-based material for carbon deposition during brazing oper Polymer-based material for carbon deposition during brazing oper

1995-12-28

1998-12-08

Ramsey, Kenneth J.

Metal fusion bonding

Process

With shaping

72 42, 228 563, B21C 3706

Patent

active

058458379

ABSTRACT:
A polymeric-based material for use in brazing operations to prevent agglomeration and run-off of brazing material on exterior exposed surfaces of the workpiece containing an extrudable melt-processible thermoplastic material selected from the group consisting of polyethylene, polypropylene, ethylene vinyl alcohol, nylon, and mixtures thereof; and up to about 20% by weight, based on the thermoplastic material, of an inert inorganic particulate material such as carbon or carbon black capable of at deposition on and adherence to an underlying metallic surface. In the process of the present invention, the polymeric-based material is imparted by any suitable means to the exterior or exposed surface of the workpiece to be brazed prior to exposure of the workpiece to a suitable fluxing atmosphere and temperature. In tube forming processes, the polymeric-based material is applied to the outer circumferential area of the formed unsealed tubing.

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