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Understanding the Aluminium Powder Coating Process

If you want your aluminium extrusion to have a world class finish then it needs to be treated. There are many options available, but one of the most popular is the aluminium powder coating process.

But it’s important that you understand what this process is and how it works, before you decide on whether it is the right approach for your project. So let’s take a closer look.

What is Aluminium Powder Coating?

As with many metals, the condition of aluminium is at risk from a number of different factors. While it is not at risk of rust, aluminium is a corrosive metal. This corrosion can take several forms, but the end result is that the metal is left tarnished. Aluminium is also susceptible to scratches and scuffs which can detract from its aesthetic appeal.

One solution to this problem is the aluminium powder coating process. It’s a system of protection which involves applying an electrostatically charged powder coating. This is applied to the surface and adheres to the existing metalwork to form a new coating. It is this coating which provides a long term protection to the metal and improves it’s appearance.

It’s estimated that the powder coating process will protect aluminium for between 15 – 20 years. This lengthy protection makes it perfect for treating the following:

• Signage
• Patent Glazing and Blinds
• Office Partitioning and Shower Screens
• Frames
• Lighting
• Electrical Housings.

As you can see, there are a wide range of possibilities when it comes to working with the aluminium powder coating process. But how exactly does this process work?

How Does Aluminium Powder Coating Work?

The exact science behind the aluminium powder coating process is complex, but there’s no need to delve deep into the chemistry. Instead, it’s possible to understand the process by breaking down its key parts. So, here’s what happens:

Pre-Treat the Aluminium: To ensure maximum adherence it’s crucial that the aluminium goes through a pre-treatment process. This involves cleaning the metal to remove any dust or foreign bodies. By carrying this out you are safeguarding against a powder coat which flakes or is unable to adhere.

Apply the Powder: The most significant step in the process is applying the electrostatically charged powder to the aluminium. The positive charge of the powder allows it to bond to the aluminium. And this bond is made possible as the aluminium will have been electrically grounded.

Heat and Cure the Aluminium: The next step is to heat the aluminium extrusion in a curing oven. The heat of this oven melts the powder into a coating which melts uniformly over the surface of the aluminium.

Cooling the Aluminium: After heating the treated aluminium there’s just one more step in the powder coating process. And that’s to allow the aluminium to cool. Once the aluminium is removed from the curing oven it is left to cool for several hours. This final step allows the powder coating to harden and complete the powder coating process.

What are the benefits of Powder Coating Aluminium Extrusions?

• Visually appealing
• Decorative coating resistant to chips and scratches.
• Easily cleanable.
• Infinite range of colours available including wood effect and textured finishes.
• Ease of finish matching various parts.
• Long term durability

For more information on whether powder coated aluminium extrusions would be a good fit for your project, don’t hesitate to get in touch and speak to one of our team by phoning 01275 879995 or e-mailing sales@custom-profiles.com