Solders are materials that are used to join two or more metal parts together by melting and flowing into the joint. Solders are commonly used in electronics to join conductive components, such as wires and circuit board traces, to each other and to mechanical components such as connectors and switches.
Solders are available in a variety of forms, including solid rods, wires, and pastes. They can also be made from a range of materials, including lead, tin, silver, and other alloys. The choice of solder material and form depends on the application and the type of metal being joined. For example, lead-free solders are often used in electronics due to concerns about lead toxicity, while silver-based solders are commonly used for their excellent electrical and thermal conductivity. In addition to their conductive properties, solders may also have other properties such as corrosion resistance or low melting point, depending on the alloy composition.