Barrel plating is an electroplating process that accommodates items to be plated in bulk. The items are placed in a barrel, which is usually made of polypropylene. The barrel contains center bars that conduct the electrical current. It circles around while immersed in the plating solution. This allows the components to accrue an even layer of a coating application as they tumble about freely.
(Freeimages / florian krebber)
Another common way to coat components is rack plating. With this method, small items are attached to a metal rack to transfer electric current from the anode. The problem with rack plating is that for jobs that involve a lot of small parts, it doesn’t present the same time and money savings as barrel plating nor does it provide the uniform coating.
The most common plating finishes used in the barrel plating process are nickel, silver, and tin. These are usually applied for small electrical items, electronic connectors, bolts, nuts, washers and screws, and other small hardware parts.
A Popular Choice
Many industries choose barrel plating over other electroplating methods because it can save both time and money. It is particularly popular for medical devices, automotive parts, electronics components, oil and gas-related equipment, and building and structural products. It should be noted, though, that the parts need to be pretty durable to weather barrel plating. This method is not recommended for plating delicate or intricate parts that could get damaged in the process.
Benefits of Barrel Plating
In addition to its ability to electroplate a number of small items in not much time, here are a few other advantages of barrel plating.
- The whole electroplating process can be done in a single vessel. This includes the cleaning, rinsing, and sealing, leading to better handling and efficiency.
- Different parts can be processed in the same barrel as long as they fit into the barrel.
- Compared with rack plating, the cascading motion of the continuous barrel rotation and the contact between the parts allows for a more consistent finish.
If you are interested in starting a barrel plating business, you can get started for significantly less money than you can with other types of plating. Barrel plating uses standard equipment without the need for special fixtures or extra equipment. You will save money and can then pass the savings on to your customers.