First use method of electric soldering iron
When using a new electric soldering iron for the first time, when it is heated to the point where the solder wire can start to melt, the solder wire should be placed on the soldering iron head to allow the solder to melt on the surface of the soldering iron head, to prevent the soldering iron head from oxidizing and not soldering. You can also apply a little solder paste or rosin. After this treatment, the soldering iron head is easily soldered and there will be no situation where the "solder ball" falls off with just one shake. Secondly, the parts to be welded need to undergo oxidation removal treatment, which means using a small knife to scrape off the oxide layer on the welded surface, applying a small amount of solder paste or rosin, and then simultaneously placing the solder wire and soldering iron head on the welding area. After melting a small amount of solder wire, the welding can be done very well.
There are two types of materials for soldering iron heads, ordinary heads use copper as the substrate; Longevity head is an electroplating method for soldering iron heads, which involves plating pure iron or nickel on the surface of copper. Its lifespan is about twenty times longer than that of ordinary heads and it is not easily deformed. The steps for soldering iron to eat tin are as follows.
① Polishing or wiping. Ordinary heads can be first polished with sandpaper or filed with a file. The length of the polishing should be slightly longer than the height of the inclined surface, and it is important to be careful and careful until the surface is clean and smooth. Then use a clean and dry cloth to wipe it clean. If it is a longevity head, it cannot be polished or filed, and can only be wiped clean with a clean and dry cloth.
② Eat tin. Prepare a small box of rosin (although the soldering wire contains rosin, the amount is too small to eat tin easily), connect the power plug, wait for a moment, and the soldering iron head will heat up. Use the soldering iron head to dip in the rosin and estimate the temperature. Just being able to melt rosin indicates that the temperature is still low; Rosin emits white smoke and the soldering iron has severe purple hair, indicating that the temperature is too high; The temperature is optimal only when rosin can melt quickly and does not smoke excessively. When the temperature of the soldering iron tip reaches its optimum, evenly dip the soldering iron tip in rosin. A soldering iron dipped in rosin should quickly melt the solder wire on the soldering iron holder plate, making it a large soldering spot (with a small amount of rosin added). The soldering iron tip should be repeatedly immersed and rotated until the polished part of the soldering iron tip is evenly coated with tin.
③ Aging. After eating tin, the soldering iron should be aged. Aging refers to temporarily not using soldering iron for welding, allowing it to continue heating with electricity for a while, then unplugging the power cord and placing it on the soldering iron holder to allow it to cool naturally. Aging can prolong the service life of soldering iron heads and cores, especially when replacing them. After eating tin and aging, the soldering iron can be used normally in the future.
Before conducting a new round of electric welding, the soldering iron used should also be checked for signs of "burning" or "incomplete ports" on the soldering iron head. "Burn to death" refers to the oxidation of the tin eating area of the soldering iron head, which turns into a burnt black head and no longer dips in tin or has poor dipping ability; "Port defect" refers to the deformation or cracking of the working surface due to convexity or concavity. Both of these situations require re soldering the soldering iron tip.
