Flux is usually a mixture of rosin as the main component, which is an auxiliary material to ensure the smooth progress of the welding process. Soldering is the main process in electronic assembly. Flux is an auxiliary material used during soldering. The main function of flux is to remove the oxides on the surface of the solder and the base metal to be soldered, so that the metal surface reaches the necessary cleanliness. It prevents soldering The surface is oxidized again, reducing the surface tension of the solder and improving the soldering performance. The quality of the flux performance directly affects the quality of electronic products. Cutting torch exporters shares with you.
First, the action of flux
The main active ingredient in flux is rosin. Rosin will be decomposed by tin at about 260 degrees Celsius, so the temperature of the tin bath should not be too high; flux is a chemical substance that promotes soldering. In soldering, it is an indispensable auxiliary material, and its role is extremely important.
1. Fold and dissolve the base metal oxide film
In the atmosphere, the surface of the base metal to be welded is always covered with an oxide film, and its thickness is about 2 × 10-9 ~ 2 × 10-8m. During soldering, the oxide film will inevitably prevent the solder from wetting the base material, and the soldering cannot be performed normally. Therefore, the flux must be coated on the surface of the base material to reduce the oxide on the surface of the base material, thereby eliminating the oxide film .
2. Reoxidation of folded base metal
The base metal needs to be heated during the soldering process, and the metal surface will accelerate oxidation at high temperatures, so the liquid flux covers the surface of the base metal and the solder to prevent them from oxidation.
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