![]() Ī number of standards exist to define the various flux types. Several types of flux are used in electronics. Some fluxes are corrosive, so the parts have to be cleaned with a damp sponge or other absorbent material after soldering to prevent damage. ![]() In soldering metals, flux serves a threefold purpose: it removes any oxidized metal from the surfaces to be soldered, seals out air thus preventing further oxidation, and by facilitating amalgamation, improves wetting characteristics of the liquid solder. ![]() By preventing the formation of metal oxides, flux enables the solder to adhere to the clean metal surface, rather than forming beads, as it would on an oxidized surface. The role of flux is typically dual: dissolving the oxides already present on the metal surface, which facilitates wetting by molten metal, and acting as an oxygen barrier by coating the hot surface, preventing its oxidation.įor example, tin-lead solder attaches very well to copper, but poorly to the various oxides of copper, which form quickly at soldering temperatures. In high-temperature metal joining processes ( welding, brazing and soldering), flux is a substance that is nearly inert at room temperature, but which becomes strongly reducing at elevated temperatures, preventing oxidation of the base and filler materials. In some applications molten flux also serves as a heat-transfer medium, facilitating heating of the joint by the soldering tool or molten solder. įluxes are also used in foundries for removing impurities from molten nonferrous metals such as aluminium, or for adding desirable trace elements such as titanium.Īs cleaning agents, fluxes facilitate soldering, brazing, and welding by removing oxidation from the metals to be joined. These agents served various functions, the simplest being a reducing agent, which prevented oxides from forming on the surface of the molten metal, while others absorbed impurities into slag, which could be scraped off molten metal. Iron ore was also used as a flux in the smelting of copper. Some of the earliest known fluxes were sodium carbonate, potash, charcoal, coke, borax, lime, lead sulfide and certain minerals containing phosphorus. They are used in both extractive metallurgy and metal joining. Fluxes may have more than one function at a time. In metallurgy, a flux (from Latin fluxus 'flow') is a chemical cleaning agent, flowing agent, or purifying agent. 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 ( February 2019) ( Learn how and when to remove this template message) Please help to improve this article by introducing more precise citations. It does everything it is supposed to do and advertised to do and at a reasonable price and cleans up quick and fast with alcohol.This article includes a list of general references, but it lacks sufficient corresponding inline citations. Like I said, I don't have a ton of experience meaning I don't solder all day long everyday but I do solder at least 3 or 4 times a week and I will never buy another brand again. I've used it with silver solder paste, silver solder wire and well just about any type of solder you would use for electronics just to see how well it would work and I get great connections that are very strong with minimal mess to clean up bec ause again I didn't need to cake the stuff on which then also goes to show about value because I use less so I need to buy less. ![]() I brush just enough to make a coating, basically wouldn't even notice that I put any on if you didn't know better and then do my work and I get awesome results with very little odor or smoke and most times non at all. I haven't a ton of experience with flux but of the stuff I have used this is the best.I watch videos and other people who just cake the stuff on when soldering and then I've seen videos and people who when using a quality flux just brush a little on the solder point and it draws the solder right in and that is what this stuff does. ![]()
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