Soldering iron soldering wire joints are always not sticky
During the use of the soldering iron, there will often be a phenomenon that the soldering iron does not stick to the solder or even cannot melt the solder. At this time, the tip of the soldering iron you see must be black. This situation indicates that the soldering iron tip has been oxidized, commonly known as "burned to death". . In this case, do not use a knife to scrape, nor use a file to file, so as not to damage the alloy layer at the tip of the soldering iron tip (tip), and it must be treated in the correct way before it can be used. The following two workarounds work well.
One of the solutions: wipe
Find a high-temperature-resistant, water-swelling rough cleaning sponge as shown below (the kind that women maintain for facial grinding, or go to the tool counter of the electronics mall to buy), soak it in water, wait for it to expand instantly, pinch off part of the water, and then Wipe the heated electric soldering iron tip on it one by one, and at the same time, rub the solder wire containing rosin on the soldering iron tip, and repeat this process until the soldering iron tip is bright and tinned.
Solution 2: Rub
With a little force, rub the heating tip of the electric soldering iron repeatedly on the lumpy solder formed by the melting of the solder wire. In the meantime, from time to time, melt the tip of the soldering iron on the rosin block that can help decontamination and coat it with rosin. Repeat the above action several times, and the tip of the soldering iron will be as bright as new and very easy to use.
After the above operations, if the problem has not been solved, then it is necessary to doubt the amount of soldering iron tip and solder wire. The former has a lot of shoddy and counterfeit products, while the latter contains very little tin. After melting, it looks like bean curd residue, and the solder joints are gray. Both are cheap and shoddy.
1. The temperature of the soldering iron is between 320 and 420 degrees. Whether the tip of the soldering iron is oxidized, turn off the power and use a knife or sandpaper to remove the oxide and can.
2. Why are the wire connectors not tinned? Generally, the normal situation is that the household appliances are broken and you may use them for a long time. The connectors of the wire ends have current passing through and external dust enters during long-term use, resulting in aging, oxidation, and dust on the wire ends, so you just weld them. up.
3. For normal welding, the temperature of the soldering iron is about 380 degrees. There is no problem with the temperature of the soldering iron tip being appropriately higher. Whether the soldering iron tip is oxidized? The outer layer of the enameled wire is conductive and insulating varnish, and then a little tin on the wire head can be firmly welded.
4. When the soldering iron does not need to be turned off, please put a little tin on the tip of the soldering iron, do not drop it, to prevent oxidation of the tip of the soldering iron, so that you will be handy when you use it next time. Finally, I would like to emphasize that it is a good thing to do it yourself, but you must ensure safety first!
