1. Tin plating

If the old soldering iron tip is severely oxidized and turns black, you can use a steel foil to remove the surface oxide to expose the metallic luster, and then re-tin plating it before use.

The soldering iron requires a 220V AC power supply, and special attention must be paid to safety when using it.

(1) It is best to use a three-pole plug for the electric soldering iron plug, and make the shell properly grounded.

(2) Before use, carefully check whether the power plug and power cord are damaged. And check whether the soldering iron tip is loose.

(3) When using the soldering iron, do not hit it hard. Be careful not to fall. If there is too much solder on the soldering iron tip, wipe it off with a cloth. Do not throw it around to avoid burning others.

(4) During the welding process, the soldering iron cannot be left lying around. When not soldering, it should be placed on the soldering iron stand. Note that the power cord cannot be placed on the soldering iron tip to prevent the insulation layer from being burned and causing an accident.

(5) After use, promptly cut off the power supply and unplug the power plug. After cooling, put the soldering iron back into the tool box.

2. Prepare solder and flux

(1) Solder: To weld electronic components, solder wire with a rosin core is generally used. This kind of solder wire has a lower melting point and contains rosin flux, making it extremely easy to use.

(2) Flux: Commonly used flux is rosin or rosin water (dissolve rosin in alcohol). Using flux can help remove oxides from the metal surface, facilitate soldering, and protect the soldering iron tip. Solder paste can also be used when soldering larger components or wires. However, it is corrosive to a certain extent, and the residue should be removed promptly after welding.

3. Prepare auxiliary tools
To facilitate welding operations, needle-nose pliers, offset pliers, tweezers, and knives are often used as auxiliary tools, and the correct use of these tools must be mastered.