process for lubricating the surface of metallic materials of copper or iron and copper alloys waehrendder cold or hot working and money to the lubrication auszufuehren.

摘要

Process for lubricating the surface of metal pieces made of copper or of iron- or copper-based alloys, intended to be deformed when cold or with heating, which process comprises a traditional surface preparation and the application of at least one lanthanide halide.