The electric soldering iron is used for soldering, and it is one of the indispensable tools for manual soldering; The best composition of its solder wire
is composed of 60% tin and 40% lead.
Before using the new electric soldering iron, use a file to file the tip of the soldering iron. After the power is turned on, the color of the soldering iron tip will change for a while, which proves that the soldering iron is hot. Then use the solder wire to put tin on the tip of the soldering iron to make the soldering iron Not easy to be oxidized. During use, the tip of the soldering iron should be kept clean and there should always be solder on the tip of the soldering iron.
When using a soldering iron, the temperature of the soldering iron is too low to melt the solder, or the solder joints are not completely melted and become unsightly and unreliable. Too high and the soldering iron "burns out" (it won't dip into the tin despite the heat). In addition, it is necessary to control the welding time. The electric soldering iron stays for too short time, and the solder is not easy to melt completely and make good contact, resulting in "virtual welding". If the welding time is too long, it is easy to damage the components, or make the copper foil of the printed circuit board. cocked.
Generally, a solder joint needs to be soldered within one or two seconds. If it is not completed, it is better to wait a while and then solder it again. The electric soldering iron cannot move during soldering. You should first select the position of the contact solder joint, and then use the tin-lined surface of the soldering iron tip to contact the solder joint.