Metal plating is a precise process involving chemical and electrochemical methods to bond a thin layer of metal onto the surface of another. It is used across various industries for corrosion resistance, improved conductivity and decorative appeal. However, the technique for plating can vary depending on the base metal being treated. Both brush and tank plating methods are employed depending on the material, desired finish and application.
Surface Preparation and Process Variations
Before any plating can occur, the base metal must be thoroughly cleaned- this is typically through polishing, electrocleaning and degreasing. This removes contaminants and ensures adhesion of subsequent layers.
For copper surfaces, plating often begins with electrocleaning followed by a nickel layer before the final metal finish, such as gold. In brush plating, additional activators and cleaning steps may be necessary between layers.
Stainless steel requires a specific activator due to its passive oxide layer. This is followed by flash plating and the chosen final coat. Non-stainless steel, by contrast, often includes a longer nickel-plating stage to improve durability.
Metals like aluminium require unique solutions, such as AllyCu, due to their reactive surfaces. Silver, palladium and rhodium generally need fewer steps, while zinc-based alloys can be more complex, often needing both Copper Strike and Electroforming Copper before further treatments like zinc nickel plating.
For anyone interested in learning more about zinc nickel plating, consider checking out a specialist such as www.swmf.co.uk/surface-coatings/zinc-nickel-alloy-plating.
Considerations for Jewellery and Alloys
When plating jewellery, nickel must be avoided due to potential allergic reactions. In these cases, a palladium layer is used instead, eliminating the need for activators while maintaining good adhesion and finish.
Whether plating chrome, titanium or gold alloys, the steps may involve stripping, activating or flash plating before the final layer is applied. Each base metal demands a tailored approach, particularly when the goal is decorative and functional, as seen in products where components must be durable and corrosion-resistant.
Understanding the varied steps across different metals helps ensure a successful plating outcome. These methods continue to support industries where reliability, conductivity and longevity are crucial.
