![]() ![]() Metal objects develop oxides over time and after being exposed to oxygen, which prevents the development of stable solder joints. As a result, flux “cleans” the metal surfaces, enabling the formation of solid solder joints.įlux is also essential for preventing the reoxidation of your metals after soldering. Then you may create a bond or solder junction by employing flux to change the surface tension of the metal’s molten solder. Molten solder can become more sticky when it is wet, or in a condition of liquidus. In comparison to liquid flux, which only comprises 2-25% active chemicals by weight, solder paste flux often includes 60-80%.įlux enables the dissolution of oxide coatings on metal surfaces, preparing the surface for solder adherence by “wetting” it. Solder paste flux differs from a liquid flux in terms of both physical shape and intensity of activity. Additionally, flux enhances the wetting properties of the liquid solder. ![]() More precisely, flux shuts out the air to prevent further oxidation and removes oxidized metal from the surfaces. ![]() When soldering electronics, a chemical called solder flux is utilized. Although there is good welding, rust is a major problem in the high RA type. High RA is the catalyst addition that is quite powerful. Medium RMA type is a halogen-based catalyst used in addition to natural rosin. The low R type contains natural rosin (no additional catalysts have been introduced). The residue left behind after soldering interacts with water and may result in a short circuit if it becomes moist, thus it has to be cleaned. Water-soluble flux is used in solder pastes for environmental cleaning. The consistent blend of solder particles, no-clean flux, and additives in disposable solder paste mixture makes it the perfect material for the manufacture of SMT.
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