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Rosin used as flux for soldering A flux pen used for electronics rework Multicore solder containing flux Wire freshly coated with solder, held above molten rosin flux. In metallurgy, a flux is a chemical reducing agent, flowing agent, or purifying agent. Fluxes may have more than one function at a time.
Citric acid is an excellent water-soluble acid-type flux for copper and electronics [18] but must be washed off afterwards. Fluxes for soft solder are currently available in three basic formulations: Water-soluble fluxes – higher activity fluxes which can be removed with water after soldering (no VOCs required for removal).
Tin-zinc solders have proven to be reliable in joining aluminum to aluminum and aluminum to copper. [3] They most often require flux and brushing with a stainless steel brush to break oxide coating to achieve proper bond. Difficult: High alloy steel Stainless steels: Too much chromium oxide. The surface needs to be cleaned with an aggressive flux.
In contrast to using traditional bars or coiled wires of all-metal solder and manually applying flux to the parts being joined, much hand soldering since the mid-20th century has used flux-core solder. This is manufactured as a coiled wire of solder, with one or more continuous bodies of inorganic acid or rosin flux embedded lengthwise inside it.
Soldering copper pipes using a propane torch and a lead-free solder. Solder is a metallic material that is used to connect metal workpieces. The choice of specific solder alloys depends on their melting point, chemical reactivity, mechanical properties, toxicity, and other properties.
Rosin based fluxes are made with rosin, a natural extract from pine trees. These fluxes can be cleaned if required after the soldering process using a solvent (potentially including chlorofluorocarbons) or saponifying flux remover. Water-soluble fluxes are made up of organic materials and glycol bases. There is a wide variety of cleaning agents ...