What are the reasons why electric soldering iron heads do not eat tin
The quality of the electric soldering iron head directly affects the welding quality. There are several reasons why a general electric soldering iron head does not eat tin.
1. Poor quality of soldering iron tip
The previously commonly used inexpensive internal heating low-power electric soldering iron. The soldering head of this internally heated electric soldering iron is made of copper and cannot be adjusted for temperature due to the lack of constant temperature function. After being powered on for a period of time, the temperature of the soldering head will become higher and higher. At high temperatures, copper soldering heads are prone to oxidation and blackening. If the soldering head is polished with sandpaper or a file, it will still oxidize and blacken after a while. Therefore, if using the cheap soldering iron mentioned above causes the soldering head to oxidize and blacken and does not eat tin, it is recommended to replace the soldering iron. It is best to choose a constant temperature or adjustable temperature soldering iron.
936 adjustable temperature electric soldering iron special soldering iron tip.
The soldering head of this 936 adjustable temperature electric soldering iron can be replaced and has multiple shapes, which can be selected according to welding needs. This type of soldering iron head is made of alloy material and is not easily oxidized at high temperatures. As long as the soldering iron head is not corroded by acidic soldering flux, and does not need to be hot melted glue or plastic, the soldering iron head is easy to tin.
2. Using acidic flux or soldering wire with too many impurities
Acidic flux.
Some beginners in electronics like to use acidic solder paste as a soldering flux when welding. This type of flux is slightly acidic and somewhat corrosive to some low-quality soldering iron tips. It is recommended to use blocky rosin or rosin alcohol solution as flux during welding. In addition, some cheap soldering wires contain a lot of impurities, and using this type of soldering wire can also cause the soldering iron head to not eat tin. Due to the poor wettability and flowability of this type of solder wire after melting, its solder joints become dark and not smooth and bright. If the poor quality of the soldering wire causes the soldering iron head to not eat tin, it is recommended to choose high-quality low melting spot welding wire during welding.
