Bare copper wire is a copper wire drawn with pure copper rod, which is made of a single material and is made of copper both inside and outside, which looks yellow in the past; The appearance of tinned copper wire is silver, because tin is a silver metal.

As shown below (the former is tinned copper wire and the latter is bare copper wire):

2, the performance is different

Physically, bare copper wire is soft and has excellent conductivity. Compared with bare copper wire, tinned copper has better conductivity, stronger corrosion resistance and oxidation resistance, which can greatly prolong the service life of weak current cables.

3, the process is different

Bare copper wire is a copper wire drawn with pure copper rod, and its material is single; The process of tinned copper wire is slightly more complicated than bare copper wire. After the pure copper rod is drawn into wire, a thin layer of tin is plated on the surface of copper wire by hot tin plating process.

Extended data:

Copper is widely used in electronic information, lubrication, catalysis and metallurgy because of its excellent performance and low price. However, copper is easily oxidized in air, and the finer the particles, the more serious the oxidation. In order to improve the oxidation resistance of copper, inert metal can be coated on the surface of copper.

Coating an inert metal layer can not only significantly improve the oxidation resistance of copper, but also maintain its conductivity. Although tin is not an inert metal and is more active than copper, it is very stable in air at room temperature because a dense oxide film will form on the surface of tin to prevent further oxidation of tin. Therefore, tin plating on copper surface can improve the oxidation resistance of copper to some extent.

Tin-plated copper has good stability, conductivity, wear resistance, corrosion resistance and electromagnetic shielding, and has good application prospects.

References:

Baidu encyclopedia-tinned copper

Baidu encyclopedia-copper wire