Oxidation can negatively impact the conductivity and cause the solder joint to fail. To avoid this, use a rosin flux on the ...

The flux serves as a temporary adhesive to hold components onto the board until the paste is heated; after heating, a stronger physical bond is formed. Pastes are typically made of tin/lead alloys.

transferring the heat from the iron’s tip to different points along the wire, then, as a barrier that helps solder not escape too far away from the pins. Copious amounts of flux likely desired ...

He’s got quite a few tips about things like surface finish and flux selection ... We’ve seen the very patient hand solder wires to BGAs. You can also find more detailed videos and compare ...

First, the wire is fed into the machine so it can be cut and shaped. Then, it is stripped at the tip and coated with flux, a cleaning agent that makes soldering and welding of metals a little easier.