Which is better, the internal heat and the external heat of the electric soldering iron?
A soldering iron is a tool, and since it is a tool, the one that suits you best is the best. Internal heating type and external heating type electric soldering iron, as the name implies, one heats up inside and the other heats up outside. Let's talk about the difference between the two.
Internal heating type soldering iron
The internal heating type heating core is inside, and the soldering iron tip is used outside. Its advantages are fast heating and high efficiency. It is very suitable for PCB soldering. Starting with a desktop electric soldering iron with temperature adjustment will give you a good soldering experience.
External heat soldering iron
The heating element of the external heating type electric soldering iron is on the outside, and the soldering iron tip is inserted inside for use. It is larger in size and is more suitable for soldering some large things. Since the heating element is outside, the heat dissipation is relatively fast, and the heating efficiency is not so high. It needs to be preheated, so it is not suitable for soldering small electronic components on the PCB, but it is relatively stable, has high power, and is not very bad. I've seen battery repairers use this to solder the connecting wires on the battery.
All in all, if you are soldering PCB, it is recommended to choose an internal heating type electric soldering iron, which can basically meet the maintenance of household appliances in life.
The internal heat heats up quickly and is good for welding small parts, but it is easy to break. The external heat heats slowly and has high power. It is suitable for immersion tin and soldering large components. It is durable, so each has its own strengths.
How to deal with the oxidation and blackening of the electric soldering iron tip
The reason for the oxidation of the electric soldering iron is that the user did not maintain the soldering iron tip. How to deal with the oxidized and blackened soldering iron tip, first use a knife to scrape off the black layer on the soldering iron tip until the natural color of copper is yellow and yellow, and then add rosin and solder. up. Remember to fill the front with solder when not using the soldering iron. This is called maintenance of the soldering iron tip. Oxidation and blackening will not occur.
Use a knife or fine gauze to remove the oxide layer on the surface, and then dip the tip of the soldering iron with rosin and cover it with solder. Note that if it is not used for a long time during use, it is best to lower the temperature or turn off the power of the soldering iron directly.
Change to a better soldering iron tip, otherwise any effort will be in vain. After tinning it, it will oxidize and non-stick. When using it normally, apply rosin first.
Scrape it with a knife to reveal the white head, dip some rosin, add solder, and it will be fine. When you don’t use a soldering iron, you must add solder to the head, otherwise it will not stick to tin.
