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Strengthening UV Resistance in Electrocoating

Strengthening UV Resistance in Electrocoating

The Power of Powder Coating

Electrocoating or e-coating is a widely used technique in various industries, from automotive to electronics, due to its excellent uniformity, superior corrosion resistance, and cost-effectiveness. However, it’s not without limitations. Notably, electrocoated surfaces tend to be vulnerable to ultraviolet (UV) light, which can lead to degradation and loss of aesthetics over time. But there’s a solution: incorporating a powder coating step after electrocoating. Let’s explore why this step is vital for boosting UV resistance and enhancing the durability of electrocoated parts.

Understanding UV Resistance in Electrocoating

Electrocoating involves the application of a water-based, protective paint onto a metal surface using an electric current. The result is a thin, smooth, and highly adherent coating that effectively resists corrosion.

The vulnerability of electrocoating to ultraviolet (UV) light primarily arises from the organic nature of the resins used in the process. When exposed to UV radiation, these organic molecules can undergo various degradation reactions. This can result in fading, chalking, or loss of gloss, which, over time, can significantly impact the part’s aesthetic appeal and performance.

Adding a Powder Coating Step

To mitigate UV-related degradation, many manufacturers employ a powder coating step post-electrocoating. Powder coating involves applying a free-flowing, dry powder onto a surface, typically using a spray gun. The coated part is then cured under heat, which melts the powder and forms a hard, protective layer.

Powder coatings are renowned for their durability, including resistance to UV radiation, making them an excellent complement to electrocoating. The powder coating effectively absorbs and disperses UV rays, reducing the amount that reaches and damages the underlying electrocoat.

At Great Dane Powder Coating, we have both electrocoating and powder coating facilities in-house, and we are experienced in using powder coating as a finishing step in electrophoretic coating.

Benefits of Electrocoating and Powder Coating Combination

This two-step process, where an electrocoated part is subsequently powder coated offers several advantages:

  1. Enhanced UV Resistance: As already highlighted, powder coating significantly boosts the UV resistance of the electrocoated part, thereby extending its life and preserving its appearance.
  2. Improved Corrosion Resistance: While electrocoating already offers good corrosion resistance, adding a powder coat creates an extra layer of protection, making the part even more resistant to rust and corrosion.
  3. Increased Aesthetics: Powder coatings are available in a vast range of colors and finishes, adding to the visual appeal of the part.
  4. Cost-Effective: Although adding a powder coating step might initially seem like an extra expense, the improved durability and extended lifespan of the part can result in long-term cost savings.

While electrocoating is a powerful technique in its own right, its susceptibility to UV degradation can be a limitation in certain applications. By incorporating a powder coating step after electrocoating, it’s possible to obtain the best of both worlds — the uniformity and corrosion resistance of electrocoating, and the UV resistance and visual appeal of powder coating. It’s a testament to the flexibility of modern coating technologies, and their adaptability in meeting the demands of diverse applications.

To learn more about how Great Dane can become a partner in e-coating your parts and products, call us at 724-537-9709 or visit our Contact Us page.

Over 29 Years of Parts Coating Excellence

At Great Dane Powder Coating, Inc., we have more than a quarter century of experience under our belts. We offer the benefits of a cutting-edge facility and high-end equipment for providing exceptional results.

It’s no wonder that we are trusted by auto manufacturers, medical suppliers, and appliance manufacturers across the country to deliver highly durable coatings on a wide variety of parts and components.

When you want affordable, reliable, and outstanding results, give us a call at 724-537-9709 or visit our NEW ELECTROCOATING CUSTOMERS page today.



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