13 Jan 2024 Flux
The flux is required during soldering to reduce the surface oxides of the joining partners and the solder material itself and thus reduce the surface tension of the solder. The flux helps to achieve good wetting of the solder on the joining partners. In the case of solder pastes, this is mixed into the paste. In flux-free soldering, on the other hand, the oxides are reduced using activating gases such as formic acid or hydrogen.