Löda

Löda is a Swedish verb meaning to solder, the process of joining metal parts by melting a filler metal with a lower melting point than the base metals. The technique is used in electronics, plumbing, metalworking, and jewelry. The noun form lödning refers to the process, and lödmetall denotes the filler metal used for the joint. In common practice, the soldering iron (lödkolv) provides the heat, and flux (flussmedel) helps the metal flow and prevents oxidation.

Soldering materials come in various alloys. Traditional Solders often rely on tin-lead alloys, which melt at relatively low temperatures, while modern, lead-free solders use compositions such as tin-silver-copper. The choice depends on the application, required electrical conductivity, and safety considerations. Common substrates include copper, tin, and copper-coated surfaces found in electronics and plumbing.

The typical process involves cleaning the surfaces, applying flux, heating the joint with the soldering iron, and applying solder so it flows into the joint. Good joints are smooth, shiny, and cover the joint without creating excess fillets or voids. Overheating, contamination, or improper flux can lead to poor adhesion, cracks, or cold joints.

Safety and environmental considerations are important. Soldering produces fumes that can irritate the eyes and respiratory system; proper ventilation or fume extraction is advised. Lead-containing solders pose health risks, so many users choose lead-free options. Protective equipment and careful handling of hot components reduce burn hazards.

Löda is distinct from welding or brazing, which involve higher temperatures and different joining methods. It remains a foundational technique in repair, assembly, and hobbyist electronics.