Electro-deposition finishing and metal protection techniques and their impact on the aesthetic values of medal surfaces

Abstract:

Electrodeposition Finishing, Protection, and Color Processing Technology for Medallion is used to give new properties to the medal that add aesthetic and functional values; Such as corrosion resistance, surface appearance improvement, and other properties. A medal that is shaped by any of the casting or minting techniques needs cladding to cover its non-precious metal with another valuable metal such as gold, silver, nickel, etc. to befit the occasion or the honor that is granted through it. And this is done by means of electro-deposition techniques that have witnessed a current development and are used to paint the metallic and non-metallic medal, in addition to, electroforming on the mold (from a non- metallic material) that has been treated with metal. Electrodeposition can be obtained by a complete palette of colors as a result of deposition of more than one metal together or by deposition of alloys. It is also possible to deposit a multi-colored film with the same components through changing the temperature factor and the other factors are remaining constant (time - concentration - basic metal of the medal). Selective or partial painting with glossy and matte finishes is also possible on the same design; with the aim of enriching the surface with a multiplicity of metallic colors with various textures. Electroplating improves a wide range of properties not found in the base material. Electrical deposition techniques have outperformed many other non-electric coloring techniques and new techniques. And they have been used nanotechnology where Electroplating can be done by depositing thin layers of nanoscale materials through carefully controlling the Intensity of Electric Current. This research aimed to benefit from Electrodeposition finishing and metal protection techniques and their impact on the aesthetic values of medal surfaces through studying several aspects.

Key words:

Electrodeposition , Nanotechnology , Nanomaterial , Nanoparticles, Corrosion