Everything you should know about powder coating finishes

WHAT EXACTLY IS POWDER COATING?

Powder coating is a dry coating process used as a metal finish mostly on industrial equipment. Powder coating is applied as dry powder through an electrostatic process, then cured with heat. It is well known for providing high-quality finishes in terms of both functionality and overall look.

The powder coating finishes are not only sturdy but flexible as well. It can be used on different surfaces, including metal, concrete, steel, and plastic. It’s suitable for both indoor and outdoor applications, and it’s one of the most cost-effective finish options.

TYPES OF POWDER COATING

There are two types of powder coating, thermosets and thermoplastics.

Thermoplastic powder coating finishes become liquid and very soft when heated. This eliminates chemical bonding. This process makes the powder coating both reversible and reusable.

Thermoplastic coatings tend to be thicker, and hence more durable compared to thermoset coatings. For this reason, they can be used for a plethora of things from metal, auto parts, and even refrigerators.

On the other hand, thermoset powder is quite different in the fact that it forms chemical bonds once cured, making it impossible to recycle it. It is suitable for high heat areas because the bonds prevent it from melting away. This type is much cheaper compared to thermoplastic.

THE APPLICATION PROCESS

Preparation is the first step of the process and perhaps the most important one. This step determines how well the powder coating adheres to the metal surface, and there are various options for cleaning and prepping the surface. Using a degreaser and/or phosphate rinse is ideal, followed by a quick water rinse. The powder is then applied using the spray gun, and curing begins right after that.

HOW DURABLE IS POWDER COATING?

This is hands down one of the most durable coatings you could use as a finish for a variety of surfaces, not just metal. The chemical bonds give a superior coating that makes it suitable for both machinery and everyday items. It holds well to extreme weather and physical impact, meaning it’s resistant to scratches, abrasions, and chips.

HOW LONG DO THE POWDER COATING FINISHES LAST?

The longevity of the product will highly depend on several factors. These factors include the quality of preparation, type of powder coating used, and the environment in which the product is exposed. Powder coating finishes can last up to 20 years, but due to the consistent use, exposure to UV light, and outdoor environment may break it down faster.