Types of Metal Finishing


Electroplating occurs when an electric current is passed through a solution which contains the metal object and it acts as a cathode. Aluminum, cadmium, bronze, brass, copper, gold, chromium, lead, iron, platinum, nickel, tin, silver and zinc can all be used for plating ferrous and non-ferrous objects.

Electroless Plating

During electroless plating no electric current is passed. The chemical is deposited on the metal product causing a chemical reaction. Salt (source metal), complexing agent, reducer, various buffers and other chemicals are used to complete the process. Copper and nickel are commonly used in printed circuit boards.

Immersion Plating

Immersion plating is very similar to electroless plating, but unlike electroless plating which uses a mixture of two chemicals, immersion plating creates the metal plating reaction through the metal substrate. This process displaces the chemical, producing a thin metal deposit on the product. Immersion plating is proven to create more waste than electroplating and electroless plating.

Other methods of metal finishing include cladding, case hardening, galvanized coatings, electro-polishing and metallic coatings.


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