Principles of brazing technology - technicalmaterials.umicore.com

Principles of brazing technology
Flux groups (I) for soldering/brazing metallic materials
Flux group Flux type Information about the manufacture Most important areas of application Nature of flux residues
3.2.2. Zinc chloride and/or ammonium Chromium-containing steels;
chloride and free acids
highly oxidised workpieces
3.1.1. Zinc chloride and/or ammonium Chromium-free steels and non-noble metals, if
Corrosive
chloride
washing off the residues is possible
Fluxes for
soldering heavy
metals
DIN EN 29454
Fluxes for
soldering light
metals
DIN EN 29454
Table 3a
3.1.1.
2.1.3
2.1.1
2.1.2.
1.1.2.
1.1.1.
1.1.3.
3.1.1.
2.1.3.
2.1.2.
Zinc chloride and ammonium
chloride in organic formulation
Organic acids
Amines, diamines, urea
Organic halogen compounds
Resins with halogen-containing
activators
Resins without additives
Resins with
halogen-free additives
Solder-forming zinc chlorides
and/or tin chlorides;
also with additives
Organic compounds
Organic halogen compounds
Chromium-free steels and non-noble metals, if
washing off the flux residues is not possible
Copper
For workpieces which can be washed
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Partly corrosive
Non-corrosive
Corrosive