The soldering iron always doesn't stick to the wire joints when welding
I am not a professional repairman. Sometimes when my home appliances break down, I want to repair them myself. However, when using an electric soldering iron to solder the wire joints, it always doesn't stick. The solder either sticks to the soldering iron or falls off, or doesn't stick to the wire. Even after using solder paste, it still doesn't stick.
During the use of an electric soldering iron, there is often a phenomenon where it does not stick to or even cannot melt the solder. At this time, the head of the soldering iron you see must be black, indicating that the head has oxidized and is commonly known as "burned to death". In this situation, do not use a knife to scrape or file, to avoid damaging the alloy layer of the tip of the soldering iron. It must be processed correctly before continuing to use. The following two solutions are effective.
One solution: wipe
Find a high temperature resistant, rough cleaning sponge that swells when exposed to water (such as women's facial care and grinding, or purchasing it at the tool counter of an electronic shopping mall), soak it in water, wait for it to expand instantly, pinch off some of the moisture, and then rub the heated soldering iron head on it time and time again. At the same time, use a soldering wire containing rosin to rub against the soldering iron head, and repeat this process until the soldering iron hair is shiny and coated with tin.
Solution 2: Rubbing
Apply a little force and repeatedly rub the heated soldering iron tip against the block shaped solder formed by melting the solder wire. During this process, occasionally dissolve the soldering iron tip on a rosin block that can assist in welding and cleaning, and then coat it with rosin. Repeat this process multiple times, and the soldering iron tip will shine as new and be very useful.
After the above operations, if the problem has not been solved yet, then the quality of the soldering iron head and soldering wire should be suspected. The former has a lot of fake and inferior goods, while the latter has very little tin content and melts like tofu residue, with dull solder joints. Both are sold at low prices and are inferior.
