Soldering iron not sticking to tin - causes and solutions
The soldering iron is one of the necessary tools for those who are engaged in electronic hardware welding. Having a good soldering iron can help us weld and debug electronic circuits with twice the result with half the effort, and can greatly improve operating efficiency. However, friends who have just learned to use a soldering iron will have this experience, that is, the soldering iron head does not stick to the tin, and will find that the molten tin sticks to the top of the soldering iron head like water droplets. Some more serious people will find that the soldering iron does not stick to the tip at all. Unable to stick tin. These phenomena bring us great trouble when welding electronic components, so how to eliminate this phenomenon? Today I will use this question to talk to my friends about how to solve the problem of the soldering iron tip not sticking to tin.
The reason why the soldering iron tip does not stick to tin
If we want to solve the problem that the electric soldering iron tip does not stick to tin, we must first understand the reason why the electric soldering iron does not stick to tin. Our friends who use electric soldering irons all know that electric soldering irons are divided into long-life pointed tip and ordinary type soldering iron tip. For long-life The pointed-shaped soldering iron tip is a metal tip mainly composed of five metal materials: copper, iron, nickel, chromium, and tin; for ordinary electric soldering iron tips, it is mainly composed of red copper or red copper. Specially prepared for copper, iron and other metals that are easily oxidized when exposed to heat. The oxidized soldering iron tip will form a thin layer of oxidized metal on the surface, which is difficult to bond with the molten metal tin. This is the main reason why the soldering iron tip does not stick to tin.
How to solve the problem of soldering iron tip not sticking to tin
Let me share with my friends how I deal with non-stick soldering iron tips. Because I usually use ordinary electric soldering iron tips. When the soldering iron tip accidentally encounters oxidation, my first step is to file the soldering iron tip with a file to remove the thin layer of metal oxide wrapping the soldering iron tip. Until the new copper is exposed on the soldering iron tip, then turn on the power and wait until the soldering iron tip reaches the heat. Add some rosin. When the soldering iron tip reaches the temperature of melting the solder wire, wrap the entire soldering iron tip with a layer of tin, so that the soldering iron tip can easily "eat" the tin. . For a long-lasting pointed soldering iron, I recommend polishing it with sandpaper and using the same method for tin application.
