Which positions meet flux in the soldering and how they are used? Fluxes are important for the shelf life of solder connections both soldering and brazing. Read what you should know about flux, their compatibility with the individual solders and metals and their application. Through exposure to oxygen oxidation is raised at the solder to the soldering joints. This can affect the reliability and stability of solder connections. Flux ENT oxidize the solder joints. In addition, improves the flow properties of solder a suitable flux and lowers the surface tension.
Both the soldering and brazing using a suitable flux is therefore absolutely necessary. The flux is always applied before soldering and heated on the Liquidus of the corresponding bid. What flux should be used for soldering? Unfortunately, there is no general-purpose flux for soldering. The flux must always be selected for the soldering procedure and for the metals to be joined. Especially in brazing, the choice of the correct flux requires professional knowledge.
However, a look at the label helps in most cases. Usually specified for fluxes always, for which soldering technique, for which lot and what metals is the product to use. The use of flux when soldering the Liquidus is reached, must the link be finished in within a few seconds (maximum 5 s). You should absolutely avoid the flux to overheated. As soon as the solder has cooled down, the flux residues must be removed. Residues of flux under certain circumstances can cause corrosion. Flux for the soft soldering process be wiped off easily with a damp cloth. While brazing flux removal is much more difficult. Usually this is achieved only mechanically, for example, with a steel brush. As an alternative, it is Use a flux remover. Flux Remover are also available for hard and soft solders. In electronics soldering, you should be especially careful with flux. This can leave namely conductive residue, which later cause short circuits. For this reason used in Electronics today mostly with solder paste, because it requires no flux. Should nevertheless in electronics soft soldered to, must be respected when determining the flux on the suitability. Health hazards are unfortunately injurious to health by the use of flux when soldering flux. The escaping vapours are strongly corrosive, what represents a bigger problem especially in brazing, since there usually much larger amounts of flux are used. It is essential to take appropriate protective measures. Safety glasses must be worn to protect of the eyes. Through the use of protective gloves is a breach of the skin on the hands prevents. Should however accidentally occur to skin contact with flux, you should wash it immediately with SOAP and water and thoroughly grease the skin for example, with Vaseline. Heat flux exists at the solder points always to the flue gas formation. You should make sure never to inhale these fumes and to ensure adequate ventilation. The work does basically a flue gas aspirator for soldering.