Check the electric soldering iron before use to prevent rapid oxidation of the soldering iron tip
1. Test resistance size
Before using an electric soldering iron, measure the resistance of the power plug to determine whether the soldering iron is usable.
The resistance of an electric soldering iron is several thousand ohms, indicating availability. If the resistance is zero or infinite, it cannot be used. If the resistance is zero, it indicates a short circuit inside the soldering iron, and if the resistance is infinite, it indicates an open circuit inside the soldering iron.
2. Apply tin plating protection
When the new electric soldering iron is used for the first time, the electric soldering iron head shall be kept bright. The soldering tin shall be heated by electricity and dipped with rosin at the same time. The soldering wire shall be contacted for many times, and the soldering iron head shall be evenly coated with a layer of soldering tin. It is convenient for subsequent use and can prevent oxidation of the soldering iron head.
The old electric soldering iron has been used for a long time, and there will be a layer of oxide on the surface of the soldering iron head, which makes it difficult for the soldering iron head to eat tin.
The oxide on the surface of the soldering iron head can be removed with fine sandpaper or a file to make its surface shiny. Then, according to the treatment method of the new electric soldering iron, evenly coat the surface of the soldering iron head with a layer of welding.
3. The problem of electric soldering iron not eating tin
When the soldering iron does not eat tin, it is generally unnecessary to consider whether it is caused by insufficient oxygen. Oxygen has nothing to do with the heating of the soldering iron. The soldering iron heats and melts the solder wire by alternating current.
Electric soldering irons do not eat tin because if they are not used due to prolonged electrification, it will accelerate the oxidation of the soldering iron core and burn it out, shortening its service life. At the same time, it can cause the soldering iron head to oxidize or burn due to prolonged heating.
This has led to the problem of electric soldering irons not eating tin. During the process of not eating tin, oxidation reactions occur, and substances undergo chemical reactions with oxygen, which provides oxygen.
When the power on time is too long and the temperature rises sharply, providing reaction conditions for the oxidation reaction will accelerate the oxidation rate of the soldering iron head and core.
