My soldering iron tip has turned black like this, what should I do?
It is a common oxidation phenomenon that the soldering iron tip turns black after being used for a long time. To solve this problem, there are the following methods.
1. When the power is off, use a file to file off the black oxidized part, and re-dip the rosin on the tin after power on.
2. Put some rosin and solder on the sandpaper. After the electric soldering iron is energized and heated, rub repeatedly in the rosin and solder sandpaper until it is bright.
In order to solve the problem of black hair on the soldering iron, you can make a small soldering tank (made of small metal cans, bottle caps, etc.), and usually immerse the soldering iron tip in the soldering tin tank to prevent the soldering iron tip from contacting with the air.
