What causes the electric soldering iron's head not to consume tin?
The quality of the soldering iron head directly affects the welding quality. Generally, there are several reasons why electric soldering iron heads do not eat tin.
1. The quality of the soldering iron head is poor
In the past, it was a cheap internal heat type low-power electric soldering iron that was more commonly used. The soldering iron tip of this internal heating type electric soldering iron is made of copper. Since it does not have a constant temperature function, it cannot be adjusted. After this electric soldering iron is powered on for a period of time, the temperature of the soldering iron tip will become higher and higher. It is easy to oxidize and turn black. Even if the tip of the soldering iron is polished with sandpaper or a file, it will still oxidize and turn black after a short time. Therefore, if the tip of the soldering iron is oxidized and blackened due to the use of the above-mentioned cheap electric soldering iron, it is recommended to replace the electric soldering iron. It is best to use a constant temperature soldering iron or an adjustable temperature soldering iron.
2. Use acidic flux or solder wire with too many impurities
Acidic flux.
Some electronic beginners like to use acidic solder paste as flux when soldering. This flux is slightly acidic and somewhat corrosive to some inferior soldering iron tips. It is recommended to use block rosin or rosin alcohol solution as flux when soldering. In addition, some cheap solder wires contain more impurities, and the use of such solder wires will also cause the tip of the soldering iron to not eat tin. Due to the poor wettability and fluidity of this solder wire after melting, its solder joints are dark, not the kind of smooth and bright solder joints. If the quality of the solder wire is poor and the tip of the soldering iron does not eat tin, it is recommended to use a good quality low-melting point solder wire for soldering.
