Why does the tin stick to the soldering head when soldering with an electric soldering iron
If the soldering head is not soldered, the soldering head will quickly oxidize due to high temperature. Commonly known as burned to death! After oxidation, the soldering iron tip turns black, and it is quite difficult to melt and weld first! You will find that the temperature of the old iron is very high, and the sparks can start when small pieces fall on it! But this solder won't melt no matter how hot it is! So the soldering iron head must retain a layer of tin film to protect it from oxidation. During welding, heat can be transferred in a timely manner to ensure welding quality.
And the soldering iron head you mentioned always has excess solder, which is also a normal manifestation. When welding, the melted solder will always flow from the low temperature area to the high temperature area. So we can take advantage of this feature by using a soldering iron to remove some of the solder from the pins of the original components when repairing circuit boards or disassembling parts. Of course, using a soldering tape and a soldering tool to remove the solder will have a better effect.
After the soldering iron head absorbs excess solder, we can use the method of shaking, gently shaking the soldering iron, and using habitual force to shake off the excess solder on the soldering iron head. Generally, we dip the soldering iron head directly in rosin, then quickly shake our wrist and throw the solder into the rosin box. When we need to solder the pins of the original components, or solder the wires, or solder the components on the circuit board, we can use a soldering iron to solder the pins of the original components directly in rosin, or solder or repair them.
