What are solder and flux
(1) Solder: For welding electronic components, solder wire with rosin core is generally used. This solder wire has a low melting point and contains rosin flux, which is extremely convenient to use.
(2) Flux: The commonly used flux is rosin or rosin water (dissolve rosin in alcohol). The use of flux can help remove oxides on the metal surface, which is good for soldering and protects the tip of the soldering iron. Solder paste can also be used when soldering larger components or wires. But it is corrosive to a certain extent, and the residue should be removed in time after welding.
