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A Combination of NOCOLOK® Zn Flux and NOCOLOK® Li Flux for Improved Corrosion Resistance Part 1

written by Leszek Orman, Radziszow / Poland; Hans-Walter Swidersky, Hannover / Germany Abstract In 2001 and in 2009 respectively, Solvay introduced two new fluxes for aluminium brazing: – NOCOLOK®Zn Flux (a ‘reactive flux’ – for the creation of precisely controlled sacrificial layers on part surfaces); and – NOCOLOK®Li Flux (for improving corrosion resistance of stationary […]

Invitation to the 2018 SOLVAY International Brazing Seminar

The Theory and Practice of the Flame- and Furnace-Brazing of Aluminium  Dates: October 9 & 10, 2018 in Hannover/Germany  Purpose of the Seminar:  The language of the seminar is English. It will take place in the Conference Center and laboratories of Solvay GmbH, in Hannover, Germany. It will provide information concerning the manufacturing practices commonly used […]

Meet us at the 10th International Congress and Exhibition Aluminium Brazing

The 10th International Congress and Exhibition Aluminium Brazing, organised by the DVS German Welding Society, will take place from 12 – 14 June, 2018 in Düsseldorf/Germany in the Radisson Blu Scandinavia Hotel. Leading specialists and authorities from the sector, well known experts from industry and research and other important decision makers from this field will […]


Flux Characteristics and Transfer Systems in Electrostatic Application – Part 5

  Flux Powder Adhesion: Dust formation and flux fall off are of general interest to the brazing industry. Regardless of the application method, dust generation (particularly airborne fines) must be avoided or kept to a minimum. If dust formation cannot be prevented, local exhaust ventilation and meticulous housekeeping are recommended. The inhalation of flux dust […]


Flux Characteristics and Transfer Systems in Electrostatic Application – Part 4

  Experiments for Flux Powder Fluidization: To illustrate the relationship between flux properties and fluidization, a series of tests was carried out using Sample 1 and Sample 2. Attached are print-outs of the particle size distribution analysis (Sympatec Helios H0851; dry powder analysis with laser) of both materials. Table 1: Particle Size Distribution Sample 1 […]


Flux Characteristics and Transfer Systems in Electrostatic Application – Part 2

  The background of electrostatic flux application: When controlled atmosphere brazing with non-corrosive fluxes was introduced, the only realistic method for using the flux was wet application. This strategy was supported by the physical and chemical properties of flux powder. Non-corrosive fluxes for aluminum brazing consist of potassium fluoroaluminates (inorganic fluorides) with low water solubility. […]