Power on the tip of the soldering iron to "tin" before use. First use a file to knead the tip of the soldering iron into a certain shape, then connect the power supply, when the temperature of the tip of the soldering iron rises to the point where it can melt tin, dip the tip of the soldering iron on the rosin, wait for the rosin to smoke, and then apply a layer of solder , Repeat this two to three times, so that the blade surface of the soldering iron tip is completely covered with a layer of tin and it can be used.
The electric soldering iron should not be energized for a long time without using it. This will easily cause the soldering iron core to burn out due to accelerated oxidation and shorten its life. At the same time, it will also cause the soldering iron tip to oxidize due to prolonged heating, and even be "burned to death" and no longer "eat tin".
