FLUX FOR SOLDERING ALUMINIUM AND THEREOF ALLOYS Russian patent published in 2017 - IPC B23K35/363 B23K103/10 

FIELD: metallurgy.

SUBSTANCE: flux for soldering aluminium and thereof alloys contains the following components, wt %: lithium chloride 20-30, sodium chloride 10-12, potassium chloride 30-45, zinc chloride 3-15, potassium fluoride 2-5, fluoride lithium 2-5 and at least one component from the group containing cesium fluoroaluminate, cesium fluoride, with a total content of 1-10. The ratio of lithium chloride to potassium chloride is 2:3, the ratio of the content of lithium fluoride and potassium fluoride is 1:1, and the total content of fluorides does not exceed 15 wt %. Soldered structures obtained with the use of flux have a strength of not less than 300 MPa, high corrosion resistance.

EFFECT: increase the service life of products.

2 tbl, 1 ex