How to solve the problem of soldering iron tip not sticking to solder
1. Prepare high-quality solder, rosin, and high-temperature sponge. Turn on the electric soldering iron, wait until the temperature is high, insert the soldering iron tip into the rosin, and shake it back and forth. Then take out the prepared solder and touch it with the soldering iron tip to melt it.
2. If the soldering iron tip has been oxidized and turned black, you can prepare a file (if you don’t have a file, you can also prepare sandpaper). Use the file or sandpaper to polish the soldering iron tip and remove the black oxide layer on the surface of the soldering iron tip.
3. The soldering iron tip is generally made of metal copper. After oxidation, black copper oxide (CuO) will be formed on the surface. Copper oxide does not stick to solder. The soldering iron tip can be inserted into a 90% alcohol solution for treatment. It should be noted that the problem of oxidized non-stick solder can be solved by putting it in the unheated state, then turning on the power, and taking it out after 1-2 minutes.
How do we use the soldering iron correctly?
1. The first thing I want to talk about is the use of flux (soldering paste). Most fluxes are acidic fluxes, which have a certain oxidizing effect on the soldering iron tip. Try not to use them.
Here I recommend a relatively easy way to make flux, which is to grind the rosin into powder and pour it into an alcohol solution to fully dissolve it. This ratio is generally 40% rosin powder plus 60% alcohol solution. There is no problem if there is more rosin. Be careful not to use medical alcohol, use more than 90% alcohol solution, and keep the container sealed.
2. The second point I want to talk about is the problem of power outage. Many friends are used to not unplugging the power plug in time after using it. When the soldering iron tip is heated, it will naturally oxidize the non-stick solder. Therefore, in daily use, it is necessary to cut off the power supply in time after use.
3. The third point I want to talk about is the tin plating of the soldering iron tip that many people ignore. In order to save trouble, most people will not tin plate the soldering iron tip after using the soldering iron. Even after the power is turned off, the temperature of the soldering iron tip is still very high and it will oxidize with the air. Tin plating it before the power is turned off can prevent it from being oxidized.
