Introduction to the reasons and solutions for the soldering iron tip not sticking to tin
During lead-free soldering, sometimes there may be a phenomenon where the soldering iron tip does not stick to tin. In addition to the quality issues of the soldering iron tip itself, we can also find the reasons for this situation from nine other aspects:
1. Choosing a temperature that is too high can easily cause severe oxidation of the soldering iron tip on the tin surface.
2. Do not eat tin on the tin coated surface before use.
3. Using incorrect or defective cleaning methods.
4. Interruption of flux in impure solder or welding wire.
5. When the working temperature exceeds 350 ℃ and the soldering stops for more than 1 hour, the amount of solder on the lead-free soldering iron tip is too low.
6. Dry burning "electric soldering iron tips, such as when the soldering table is open and not in use, and the surface of the electric soldering iron tip is not soldered, can cause rapid oxidation of the electric soldering iron tip.
7. The flux used is highly corrosive, causing rapid oxidation of the soldering iron tip;
8. Using neutral and active soldering flux, without frequently cleaning the oxide on the soldering iron tip
9. Contact with organic substances such as plastics, lubricants, or other compounds. The usual handling method:
It is to use a small knife to scrape off the oxide layer of the soldering iron tip, exposing the copper that has not been oxidized by air. Then, put it in a rosin box and dip it in, then dip it in tin, and it can be used normally. However, this method is not thorough in cleaning, and long-term scraping can cause the soldering iron tip to become thinner, affecting heat transfer, resulting in a decrease in temperature, and even damaging the soldering iron tip.
The fast and efficient processing method is:
Holding the wooden handle of the electric soldering iron, immerse the oxidized soldering iron tip into a container containing alcohol. After 1-2 minutes, remove the oxide completely and cleanly, and the soldering iron tip will be refreshed. This is because after heating copper oxide and alcohol, a chemical reaction occurs, which reduces copper and has no corrosive effect on the soldering iron tip.
