What should I do if the soldering iron tip burns to death?
Regarding the method to deal with the burnt tip of the electric soldering iron, the tip of the electric soldering iron is often not stained with tin after being used for a long time. Use a knife to scrape off the copper oxide film to reveal the copper inside that has not been oxidized by air, and then put it into a rosin box and dip it , then dip it in tin, and you can continue to use the soldering iron.
Electricians often use soldering irons to solder components. After a soldering iron has been used for a long time, the tip of the soldering iron often does not stick to tin. This is because the surface of the copper tip of the soldering iron will oxidize to form a layer of copper oxide (CuO) after being used for a long time. , preventing it from being stained with solder.
The usual treatment method is to use a knife to scrape off the copper oxide film to reveal the copper inside that has not been oxidized by air, then put it into a rosin box and dip it in, and then dip it in tin, and then it can be used normally.
However, this method removes slowly and incompletely. At the same time, if it is scraped for a long time, the copper head will become thinner and affect heat transfer, causing the temperature to drop and even damage the copper head.
Quick and efficient treatment method: Hold the wooden handle of the electric soldering iron, immerse the oxidized copper tip in a container filled with alcohol, take it out after 1-2 minutes, the oxide will be completely and cleanly removed, and the copper tip will look brand new. This is because after a chemical reaction occurs when copper oxide and alcohol (C2H5OH) are heated, copper is reduced and has no corrosive effect on the soldering iron tip.
Correct soldering steps for electric soldering iron
Mastering the correct welding steps is the key to ensuring welding quality.
① Place the soldering iron tip at the pin of the component to be soldered, and heat the solder joint first. When the solder joint reaches the appropriate temperature, place the rosin solder wire on the solder joint in time to melt it.
②After the tin melts, the soldering iron tip should be moved slightly according to the shape of the solder joint so that the solder evenly covers the soldered joint and penetrates into the gaps on the soldered surface. After the appropriate amount of solder has melted, the solder wire should be removed quickly.
③When the solder joint is nearly full of solder, the flux has not completely evaporated, the temperature is appropriate, and the solder is the brightest and most fluid, move the soldering iron tip quickly along the direction of the component pins. When you are about to leave, quickly bring it back, and at the same time Leave the solder joint to ensure that the surface of the solder joint is bright, smooth and burr-free.
Finally, use diagonal pliers to cut off the excessively long component pins until the component pins are slightly exposed to the solder joints.
The operation time of the above steps ①-② should be controlled at 2-3 seconds. Beginners usually take a long time to weld. Long heating time will cause the copper foil on the printed circuit board to be damaged beyond repair.
Step ③ plays a decisive role in the quality of the solder joints. It requires more practice before you can master the operation essentials.
