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Production
NOCOLOK Flux is produced in the liquid phase using Al(OH)3, HF and KOH as raw materials.
Stringent process tolerances and a variety of quality control procedures (Alcan Standards) produces a flux of the highest quality and consistency.
The result is a fine white powder consisting of a mixture of the potassium fluoroaluminate salts.
Specification
| K |
 |
28-31 % |
| Al |
|
16 – 18 % |
| F |
|
49 – 53 % |
| Fe |
max. |
0,03 % |
| Ca |
max. |
0,1 % |
| LOH |
max. |
2,5 % |
Physical Properties
| Appearance |
white powder |
| Density (20 °C) |
g/cm3 |
2,8 |
| Bulk density |
g/l |
350-550 |
| Melting point |
°C |
565 – 572 |
| Solubility in water (20 °C): |
g/l |
4,5 |
Particle Size Distribution
The chosen particle size represents the optimum compromise between powder handling up to suspension preparation and the melting characteristics during the brazing process. Agitation of the aqueous suspension avoids settling.
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Melting point
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The eutectic composition of NOCOLOK Flux has a defined melting point range of
565° C to 572° C, just below the melting temperature of 577° C of the Al-Si brazing alloys.
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