What is powder coating?
Powder coating is a dry finishing technique where electrostatically charged powder particles are sprayed onto a pre-treated surface – typically metal. After application, the coated item is cured in an oven, causing the powder to melt and form a seamless, long-lasting layer. This process results in a tough, attractive, and eco-friendly finish that resists fading, corrosion, and surface damage.
Which materials are suitable for powder coating?
While powder coating is primarily used on metals like aluminium, mild steel, stainless steel, and galvanised steel, certain heat-resistant non-metallic materials – such as MDF and specific plastics – can also be coated using specialised processes.
How is powder coating different from traditional paint?
Unlike liquid paint, powder coating provides a thicker, more consistent coating without dripping or running. It’s also a greener option, free from VOCs and solvents, and excess powder can often be reclaimed, reducing overall waste.
Is powder coating considered eco-friendly?
Yes, powder coating is among the most environmentally responsible finishing options available. It emits little to no VOCs and doesn’t rely on hazardous chemicals, making it a safer choice for both workers and the environment.
What is the lifespan of a powder-coated finish?
When applied and cured correctly, powder coatings can last between 10 and 20 years or more. Outdoor environments may require UV-resistant formulations to preserve appearance and performance over time. In many cases, it outperforms conventional paint in terms of longevity.
Can a powder-coated surface be stripped or the coating removed?
Yes, there are several effective methods for removing powder coating, including chemical stripping, abrasive blasting, and thermal techniques like burn-off ovens. Each approach is chosen based on the item’s material and coating thickness.
Is powder coating effective in high-heat environments?
Yes, there are high-temperature powder coatings available that can tolerate extreme conditions – some up to 1000°F (538°C). These are commonly used in industries like automotive, aerospace, and general manufacturing.
How should powder coating materials be stored?
To preserve their effectiveness, powder coating powders should be kept in a dry, cool place, shielded from moisture and direct sunlight. Proper storage helps maintain consistent coating performance.
Does powder coating offer rust protection?
Definitely. Powder coating acts as a shield against moisture and oxygen – two key contributors to rust. Its protective properties make it ideal for outdoor or exposed metal items such as railings, gates, vehicle components, and industrial structures.
How does Northpoint ensure consistent coverage, even in tricky spots?
We apply advanced techniques to guarantee even powder distribution, especially in hard-to-reach areas. These include modifying electrostatic charge settings, preheating components, using specialised nozzles, and sometimes applying conductive primers to improve adhesion.