2023
DOI: 10.24425/mper.2023.147197
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Measurement Methods for Flux Residue Quantity after Controlled Atmosphere Brazing of Aluminum Coolers

Sławomir NADOLNY,
Adam Hamrol,
Michał Rogalewicz
et al.

Abstract: The Controlled Atmosphere Brazing (CAB) process together with NOCOLOK flux is associated with the occurrence of potassium fluoroaluminate residue inside the cooler. Excess of this flux residue is known to cause gelation of the coolant, which deteriorates the efficiency of the cooler. The flux residue amount is most often measured via Atomic Absorption Spectroscopy (AAS), in accordance with DIN ISO 9964-3. This is a time-consuming measurement that requires the use of specialized equipment and costly solvents. T… Show more

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