The production of a thin coating of one metal on another by electrodeposition. It is very extensively used in industry and is continuing to enlarge its useful functions. Various plated metals and combinations thereof are being used for different purposes, to illustrate:\n1. Decoration and protection against corrosion copper, nickel and chromium\n2. Protection against corrosion cadmium or zinc\n3. Protection against wear-chromium\n4. Build-up of a part or parts undersize – chromium or nickel\n5. Plate for rubber adhesion - brass\n6. Protection against carburization and for brazing operations – copper and nickel