BRAZING OF ALUMINIUM

摘要

Brazing of aluminum is preformed by the employment of a flux comprising a mixture of non-hygroscopic potassium fluoaluminates, essentially free from unreacted potassium fluoride. The flux is preferably produced by fusing together commercial grades of potassium fluoride and aluminum fluoride. The flux may advantageously be employed in the form of an aqueous slurry. The advantage of the method is that the flux is totally water-insoluble and may be stored in the form of a slurry without risk of disproportionation. Furthermore it leaves no soluble residues after brazing.