Device for the electropolishing of multiple free- moving items by means of solid electrolytes

An assembly for electropolishing metal surfaces, the assembly comprising:

• a container holding a plurality of particles of solid electrolytes formed by resins of ionic exchange that retain a neutral, acid or basic liquid;
• an electrical source;
• a housing element located inside the container and configured to house at least two metal parts such that the at least two metal parts have a freedom of movement inside the housing element, the housing element configured to prevent a falling out of the at least two metal parts during an electropolishing of the at least two metal parts, the housing element including a first electrode for connecting the at least two metal parts to a first pole of the electrical source;
• a second electrode located inside the container and connected to a second pole of the electrical source, the first and second poles having opposite polarities, and the second electrode electrically coupling the second pole to the electrical source to the plurality of particles of solid electrolytes;
• and
• means to produce within the container a relative movement between the plurality of particles of solid electrolytes and the at least two metal parts to polish the metal surface of the at least two metal parts within the container.