What is Plating? - Advantages & Disadvantages
What is Plating? - Advantages & Disadvantages
Plating
Plating refers to a hydrolysis technique widely utilized for creating specific architectural finishes, where a layer of one metal is applied over another metal.
There are two primary methods of plating:
- Electroplating ' This approach involves the application of an electrical current to a bath solution known as an electrolyte. Two electrodes are immersed in the electrolyte, completing a circuit using a battery or other power source. Carefully selected materials comprise the electrodes and the electrolyte. When electric current passes through the circuit, the electrolyte dissociates, and a thin layer of metal atoms is deposited onto one of the electrodes, resulting in electroplating.
- Electroless Plating - This technique relies on simultaneous chemical reactions in an aqueous solution and does not require external electrical input. A common example of this process is nickel plating.
Pros and Cons of Plating:
Benefits
- Accommodates a variety of high-quality metals.
- Acts as a protective barrier against corrosion.
- Offers a range of distinct yet confined architectural finishes.
- Cost-efficient method for finishing.
- Enhances the strength and hardness of the substrate.
Drawbacks
- May be prone to cracking and chipping in harsh conditions.
- Can be time-consuming, as many finishes require additional hand polishing to reach the desired quality.
- If mismanaged, the process may reveal surface imperfections like pitting and scratches, especially on lower cost metals.
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Uses:
A multitude of manufacturers opt to plate their lighting products for its cost effectiveness. For a superior finish, hand polishing can replicate antique styles. However, plating is not ideal for all scenarios, particularly in settings prone to scratches, such as in-ground or marine environments. This finish is better suited for fixed installations, such as downlights, where the product remains stationary and therefore has a reduced risk of damage.
Discussing the Benefits of Electroplating
The benefits of electroplating include:
(i) Efficiently coats a desired metal onto other objects.
(ii) Shields metals from corrosion.
(iii) Prevents rusting on metallic surfaces.
(iv) Cheaper, dull metals can be enhanced with a layer of more expensive, shiny metals.
(v) Reduces the reactivity of more reactive metals like iron.
(vi) Chromium coatings provide a lustrous finish to various objects.
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