Analysis of flux working principle

Generally speaking: is in the whole welding process, flux through its own active substance, remove the oxide layer on the surface of the welding material, at the same time, reduce the surface tension between the liquid tin and welding material, enhance the performance of liquid tin flow, infiltration, help to complete the welding, so its name is called "flux".

If you want to carry out a full analysis of the working principle of flux, that is, through the activated material in flux to clean the oxide on the surface of the welding material, so that the solder alloy can be well combined with the welding material and form a solder joint, in this process, the main role is the activator in flux and other substances, These quickly remove oxides from pads and component pins, and sometimes protect the material being welded from oxidation until the weld is complete.

In addition, at the same time of removing the oxide film, the surfactant in the flux also began to work, it can significantly reduce the surface tension of liquid solder on the surface of the welded material, so that the fluidity and spreading ability of liquid solder is strengthened, and ensure that tin solder can penetrate into every fine brazing gap; In the tin furnace welding process, when the welding body leaves the surface of liquid tin, because of the wetting effect of flux, excess tin solder will flow down the pin, so as to avoid bad phenomena such as drawing and welding.