Reference

Fluoroaluminate flux for brazing or welding of aluminum parts

Fluoroaluminate flux for brazing or welding of aluminum parts. Hignett, Geoffrey John; McNeillie, Alastair; Slater, David (Laporte Industries Ltd., UK). Eur. Pat. Appl. EP 461697 A1 18 Dec 1991, 6 pp. DESIGNATED STATES: R: BE, DE, ES, FR, GB, IT, NL, SE. (European Patent Organization). CODEN: EPXXDW. CLASS: ICM: B23K035-363. APPLICATION: EP 91-201331 31 May 1991. PRIORITY: GB 90-13043 12 Jun 1990. DOCUMENT TYPE: Patent CA Section: 56 (Nonferrous Metals and Alloys) The K fluoroaluminate fluxes suitable for application by aq. spraying contain 30.05 wt.% B, and have at. Al:F ratio of 1:(3-5) and Al:K ratio of 1:<1.25. The powd. flux is manufd. by grinding of slags from the manuf. of Al-B master alloys contg. >1 wt.% B. Thus, the powd. flux from the slag in manuf. of Al-4 wt.% B master alloy was stable in test with aq. 30 wt.% slurry. 60304-36-1 and 107529-60-2 which are cas registry numbers of chemicals are mentioned. The flux was suitable for brazing of Al, and contained Al2O3 35.5 K2O 35.7, and B 0.03 wt.% with the Al:K:F at. ratio of 1:1..4 and fusion at 553°. The similar flux from the manuf. of Al-5 Ti-1 wt.% B alloy formed a gel in the aq. test slurry. .