The NOCOLOK dictionary was the reference book for the brazing of aluminium at its release over a decade ago. Now it has been completely revised and published under the name NOCOLOK Encyclopedia, with many additional chapters including a chapter on special fluxes. Within the new, fresh and tidier design lies concentrated knowledge for technicians and
In a flux delivery system, the distances that the flux slurry has to travel is often very short and there is no time for the flux slurry to settle out in the lines or header pipe of the nozzle array. However, if the flux slurry must be conveyed over long distances, to the waste water
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In recent years, the topic of what to do with wastewater from fluxing operations has gained a lot of attention in light of heightened environmental awareness and compliance. Years ago, wastewater from cleaning slurry booths, waste flux slurries etc. were simply diluted and dumped down the drain. Some manufacturers are still following this practice, but
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Selective Pre-Fluxing with Adhesives – Fashion or Progress Summary Over the last 15 years, selective prefluxing – also called paint fluxing or binderbased fluxing – has evolved as an alternative method for applying flux powder in the aluminium brazing industry. There are many activities to define process parameters of fluxing with adhesives. The first part
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Dumping With continuous use, a flux slurry will eventually become contaminated. So far, there is no data that correlates the level of accumulated contaminants with poor brazing. Therefore, it is better to be on the safe side rather than wait till the number of rejects rise due to a contaminated or dirty slurry. It is
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De-ionized (DI) or reverse osmosis (RO) water is recommended to make up the flux slurries. This is to avoid long-term accumulation of mineral deposits in the flux delivery system that can cause blockage of nozzles and/or inadvertently drop on the heat exchanger. Furthermore, local plant or city water may contain ppm levels of contaminants such
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Selective Pre-Fluxing with Adhesives – Fashion or Progress Summary Over the last 15 years, selective pre-fluxing – also called paint fluxing or binder-based fluxing – has evolved as an alternative method for applying flux powder in aluminium brazing industry. There are many activities to define process parameters of fluxing with adhesives. The first part of
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Preparation In the simplest operation, the lid is removed and flux is manually scooped out of the drum (with a large plastic scoop) and added to the flux slurry reservoir tank. The flux should always be added to water and never scooped into an empty tank. Aerosolization should be controlled by a local exhaust ventilation
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Selective Pre-Fluxing with Adhesives - Fashion or Progress Summary Over the last 15 years, selective pre-fluxing – also called paint fluxing or binder-based fluxing – has evolved as an alternative method for applying flux powder in aluminium brazing industry. There are many activities to define process parameters of fluxing with adhesives. The first part of this
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This technique, also known as dry fluxing is gaining popularity as an alternative fluxing practice and therefore will be described here in some detail. Dry fluxing is a technology whereby the flux is electrostatically charged and applied to a grounded work piece, in our case a heat exchanger or individual heat exchanger components. The electrostatic
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