Classification of soldering irons and some tips before their use
Electric soldering iron is a magical tool for electronics enthusiasts. The soldering of components determines product quality, and soldering technology is the basic link to ensure soldering quality, product quality, and reliability. For example, internal heating soldering iron, external heating soldering iron, constant temperature soldering iron, suction soldering iron, etc.
Internal heating electric soldering iron: composed of a connecting rod, handle, spring clip, soldering iron core, soldering iron head, etc. The soldering iron core of the electric soldering iron is placed inside the soldering iron tip, which is made by winding nickel chromium resistance wire around a ceramic tube.
External heating electric soldering iron: Its soldering iron tip is located inside the soldering iron core and is made of copper alloy material with good thermal conductivity as the base. The soldering iron tip can be extended and retracted. If you want a higher temperature, make the soldering iron tip shorter, otherwise make it longer.
Thermostatic soldering iron: Its soldering iron tip is equipped with a magnetic thermostat for controlling the power on time. If the welding temperature is not high and the welding time is not long, a constant temperature soldering iron can be used.
Soldering iron: It is a soldering tool that integrates a piston type soldering iron and a soldering iron, making it flexible and convenient to use with a wide range of applications.
Before using the soldering iron, it is best to measure the resistance of the power plug to determine whether the soldering iron can be used. If the resistance is several thousand ohms, it can be used; if the resistance is zero or infinite, it cannot be used. If the resistance is zero, it indicates that there is a short circuit inside the soldering iron. If the resistance is infinite, it indicates that there is an open circuit inside the soldering iron.
Some practices before using an electric soldering iron
When using a new soldering iron for the first time, ensure that the tip of the soldering iron is bright, heat and melt the solder while dipping it in rosin and repeatedly contacting the solder wire to evenly coat the tip with a layer of solder. The purpose of doing so is not only to facilitate subsequent use, but also to prevent oxidation of the soldering iron tip. For the treatment of old soldering irons before use, due to long-term use, there will be a layer of oxide on the surface of the soldering iron tip, which makes it difficult for the soldering iron tip to eat tin. So the only way is to remove the oxide on the surface of the soldering iron tip with fine sandpaper or file, making its surface shiny. Then install a new soldering iron treatment method and evenly coat the surface of the soldering iron tip with a layer of solder.
Oxygen is actually not related to heating with an electric soldering iron. An electric soldering iron heats and melts solder wires through alternating current. And what the questioner may be saying is that soldering irons do not eat tin, which is because if the soldering iron is powered on for too long and not used, it will accelerate the oxidation of the soldering iron core and burn it out, shortening its service life. At the same time, it can also cause the soldering iron tip to oxidize or burn out due to prolonged heating. Therefore, the soldering iron no longer consumes tin. During the process of not eating tin, an oxidation reaction occurs, where the substance undergoes a chemical reaction with oxygen, with oxygen providing oxygen. Under normal circumstances, it oxidizes slowly, but if the power is applied for too long and the temperature rises sharply, it provides reaction conditions for the oxidation reaction, accelerating the oxidation rate of the soldering iron tip and core.
