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 […]
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 Powder Fluidization: In an effort to develop a flux with more desirable properties for electrostatic application, the first step is to qualify criteria. In summary of the above, it is apparent that fluidization is one of them. There is standard equipment available on the market to quantify fluidization characteristics. However, when we tested […]
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. […]
Introduction: This article summarizes some experimental results of a project on electrostatic application of non-corrosive fluxes for aluminum brazing. The objective is to qualify and quantify flux powder properties and equipment parameters with positive effect for dry flux technology. For more than 30 years, controlled atmosphere brazing (CAB) [NOCOLOK ® Flux brazing] has been […]
Solvay is exhibiting on the Schweißen & Schneiden in Dusseldorf. Visit our stand in hall 13, booth number C16. The specialists from the NOCOLOK® Team will be on site – and are looking forward to meeting with you. The Schweißen & Schneiden (Welding & Cutting) is the international trade fair for joining, cutting, and surface treatment – taking […]
Brazing Issues Folded tubes (or B-type tubes) for radiators have been developed several years ago. There are slightly different designs patented by most of the heat exchanger manufacturers. Below illustrations show three different B tube designs: The folded tubes are produced from brazing sheet coils by a multi-step roll forming process – bringing the sheet […]
The Theory and Practice of the Flame- and Furnace-Brazing of Aluminium Dates: September 5 & 6, 2017 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 […]
May 16 – 17, 2017 in Düsseldorf, Germany The 5th International Congress and Exhibition on Aluminium Heat Exchanger Technologies for HVAC&R, organised by the DVS German Welding Society, will take place from 16 – 17 May, 2017 in Düsseldorf/Germany in the Radisson Blu Scandinavia Hotel. Stringent environmental requirements for increasing energy efficiency and reducing […]
What is NOCOLOK® Cs Flux (SM)? (Synthesized Material) NOCOLOK® Cs Flux is used for brazing of aluminium alloys with higher magnesium levels. The Cs flux currently available for CAB (Controlled Atmosphere Brazing – furnace brazing) is a technical mixture (i.e. a mechanical blend) of K-Al-F flux (NOCOLOK® Flux) with Cs-Al-F flux – this product is offered […]