Why do we usually use flux in soldering? Rosin is generally used for small parts soldering, while flux is used for large parts soldering. As we all know, rosin is used for circuit boards and flux is used for single parts soldering. Do you know how to use flux? Everyone should first understand what flux is. Now, let JJY solder Paste Manufacturer explain it to you:

Everyone should know that the surface of the copper foil on the copper clad laminate will oxidize, and the solder will also oxidize at high temperatures. If the oxide layer is not removed with flux, a false solder joint will occur, and a reliable ohmic connection cannot be guaranteed.

Solder wireUse rosin(Resin)Flux is the main flux. Earlier, some manufacturers launched "washed solder wire", and currently, some solder wire manufacturers have also introduced "no-clean solder wire".

When customers use it, they often report several problems with the solder wire, such as slow soldering speed, dull solder joints, corrosion of the soldering iron tip, excessive smoke, and overly pungent smell, etc. Among these issues, the "slow soldering speed" might be caused by insufficient power of the soldering iron or low tin content. However, when the tin content is constant, the activation performance of the flux in the tin wire and its surface wetting performance are also the main factors determining the soldering speed. The "dull solder joints" are directly related to the tin content. However, when the tin content is certain, a more active flux may cause the solder joints to be dull. One of the key reasons for the corrosion of soldering iron tips is the excessive arsenic content in tin alloys. However, when the flux is highly active or inorganic activators are added, there is also a possibility that the soldering iron tip may be corroded. As for "excessive smoke" and "overly pungent smell", although they are subjective adverse conditions, the improper selection of activators, surfactants or additives in the flux is the main cause of this situation..

Shenzhen JJY, a well-known brand of solder paste, has a long history12A manufacturer of solder paste and solder wire with a year of product research and development, specializing in solder paste, solder wire, lead-free solder paste, leaded solder paste, solder rods, leaded solder paste, etc. For solder paste, choose the well-known brand of JJY as the solder paste manufacturer.