The soldering iron does not melt and does not stick to tin
The soldering iron is a must-have tool for electronics enthusiasts and practitioners. New soldering irons will have a protective layer on the tip to protect the tip from oxidation. At this time, it is easy to tin the soldering iron, but some improper operations, continuous heating, use of acidic flux, and failure to add solder when not in use, etc. will cause the soldering iron tip to oxidize in advance and cause the problem of inability to tin.
Ordinary soldering iron
Some ordinary electric soldering irons do not have constant temperature and temperature adjustment functions, and due to their low price, they do not use copper or alloy soldering iron tips. After the electric soldering iron is powered on, the soldering iron is in a continuous heating state, and the soldering iron tip is easily oxidized. Some electric soldering irons may even cause the tip to burn red.
Solution:
You need to polish the soldering iron tip with a file or sandpaper to remove the oxide layer on the surface of the soldering iron tip, then put it into the rosin, turn it back and forth a few times, and add solder. If the soldering iron tip still cannot be tinned normally after this method, you need to replace it with a new soldering iron tip. Select the appropriate soldering iron tip according to the soldering iron model and power.
Like some constant temperature temperature-adjustable soldering irons, such as the very commonly used 936 model soldering station. Due to its own temperature regulation and constant temperature functions, the soldering iron tip uses an alloy tip, which is not easily oxidized and can work stably at the set temperature. And this kind of electric soldering iron not only heats up very quickly, but some also have an automatic shutdown function when not used for a long time, which greatly reduces the oxidation of the soldering iron tip. Therefore, it is recommended to use this kind of electric soldering iron, which is more convenient.
Precautions for using soldering iron:
When the soldering iron is not in use, be sure to turn off the power in time or add solder to the soldering iron tip to prevent oxidation of the soldering iron tip. Do not use acidic flux as it can easily cause oxidation of the soldering iron tip. You can use a flux mixed with rosin and alcohol to assist in soldering. In terms of solder selection, some better solders should be selected.
