Nano-fluoroaluminate (potassium cryolite) is better used in aluminum alloy

Fluoride potassium aluminate is a eutectic aluminum soldering flux, using KF - the eutectic point of ALF3 is composed of aluminum fluoride mixed acid potassium salt as flux, namely between two intermediate compounds K3AlF6 - KAlF4 eutectic point of molten salt, is developed in the late 1970 s, no corrosion, insoluble soldering flux, aluminum processing level is greatly increased.
But is worthy of aluminium fluoride eutectic solder melting point on the high side, and are used with the melting point of filler metals differ, limited to al-si filler metals, thus limits can be the kinds of aluminum alloy brazing.
In the process of potassium fluoaluminate preparation, a third or more salt is added to improve the properties and application of the flux.
In the application process of aluminum flux, it is generally accepted that the smaller the size of the flux, the better the performance.

Therefore, the nano-fluoroaluminate has no special characteristics of aluminum flux prepared by general common specification methods.