Does rosin in solder wire have any effect on the smoothness of soldering?

Many people should know that a long time agoSolder wireIt can still be soldered well without rosin. Later, rosin was basically added to solder wires. Why is that? As is well known, many linear solders, such as solder wires and solder wires, have rosin cores added. In addition to special equipment and solder wires with different welding requirements(Solid solder wire)In addition, no rosin core was added. Some people say that adding rosin should make the solder joints more rounded and might also improve the fluidity of the solder when soldering with a soldering iron? Now, let's have a chat together with JJY Solder Paste Manufacturer:

Nowadays, it's not just rosin. Solder paste and flux are all used to increase the success rate of welding or make the solder joints look better.

Sometimes the rosin in the solder wire turns white, causing the circuit board to be very dirty. How to solve this problem?
The main reason why the circuit board is very dirty is that rosin is relatively brittle. After the soldering is completed, if it is hit, the rosin is prone to cracking, resulting in the phenomenon of white powder The rosin after welding may also turn white due to the influence of the weather, but this situation is extremely rare. To solve this problem well after weldingPCBThe board should be well protected, with special attention paid to moisture-proofing.
Identification method of rosin solder wire:

seeSolder wireThe cross-section, that is, whether the crack of the solder wire is hollow or not. If there is white powder inside, it is rosin, but it is not clearly visible. If there are holes, it is basically there. You can also try putting it on an electric soldering iron. If it gives off white smoke and has a special fragrance, that's it.

Why is lead-containing tin soldering so beautiful? But now, to be environmentally friendly, it can't be used. So, it needs to be both environmentally friendly and good-looking. Therefore, rosin is added inside, and the tin dots become beautiful. If you want to know about solder paste, lead-free solder paste, solder paste and other soldering issues, welcome partners to consult Shenzhen JJY Industrial Technology Co., LTD. Let's learn and grow together!