Process for production of copper or copper base alloys

摘要

There is provided a process for the production of copper or a copper base alloy that can provide a surface having improved characteristics suitable for the production of a connector or a charging-socket of an electric automobile because of having a decreased coefficient of friction on the surface and improved resistance to abrasion, said process comprising coating copper or a copper base alloy with Sn, followed by heat treating the resulting Sn-plated copper or copper base alloy in an atmosphere whose oxygen content is no more than 5%, thereby forming on the outermost surface thereof an oxide film and beneath it a layer of an intermetallic compound mainly comprising Cu-Sn.