Treatment for burns caused by an electric soldering iron
The so-called electric soldering iron burns to death means that the soldering iron cannot be attached to the tin, because the temperature of the soldering iron tip is too high and the surface is severely oxidized. There are generally two ways to prevent the occurrence of burns:
1. Intermittent power supply: In the process of soldering, once the soldering iron temperature reaches, the power supply can be cut off to prevent overheating and oxidation.
2. Cooling method: use a cooling stand.
Disposal after burning
1. Use a knife to hang off the oxide layer on the surface.
2. Put the oxidized copper tip into a container filled with ethanol (1-2min), because after the copper oxide and ethanol are heated to produce a chemical reaction, copper is reduced again, and ethanol has no corrosive effect on the soldering iron tip.
Soldering iron pre-soldering treatment
Before soldering, pre-soldering treatment should be performed on the component pins or the soldering parts of the circuit board.
1. Remove the oxide layer on the welding part
A knife can be made from a broken saw blade. Scrape off the oxide layer on the surface of the metal leads to expose the metallic luster of the leads.
The printed circuit board can be polished with fine gauze paper, and then coated with a layer of rosin alcohol solution.
2. Component tin plating
Tin on scraped leads. After dipping the lead wire in the rosin alcohol solution, press the tip of the hot soldering iron with tin on the lead wire and turn the lead wire. The leads can be evenly plated with a very thin layer of tin. Before the wire is welded, the insulation sheath should be peeled off, and then the above two treatments can be performed before formal welding. In the case of multi-strand wires, they should be twisted together after polishing, and then tinned.
Scrape off the oxide layer and evenly plate a layer of tin
