and promote wetting of the surfaces by the solder metal. It is also important to use fluxes that meet the ASTM B 813 standard ...

Soldering flux is (or at least, should be) one of the ubiquitous features of any electronics bench. It serves the purpose of excluding oxygen from a solder joint as it solidifies, and in most ...

Now Pi boards have their tiny bits and bigger pieces soldered at the same time through an intrusive reflow soldering process ...