Sandblasting is essential for ensuring powder coatings adhere correctly to a metal surface. Without this step, you risk a finish that is more likely to fail over time and look poorly applied overall. To help shed some light on this process, here are the most important things you need to know.
What are Powder Coatings?
First and foremost, powder coating is a dry finish process that comprises 15% of all industrial finishes. Considered to be 100% solids, this process doesn’t require the use of solvents during formulation, unlike liquid coatings. Capable of being used on a wide array of components, companies turn to this option due to its durability, quality, and efficiency. Powder coating can be used simply or decoratively, and in a wide range of colors and textures, making it one of the most flexible options available.
Sandblasting Services and Powder Coating
A sandblasting service is the best way to prepare components for powder coatings. Also known as media blasting, this method is essential for ensuring a piece is clean of dirt, paint, corrosion, rust, and oils — all of which could prevent the powder coating from adhering correctly. When compared to other methods, a sandblasting service stands out as the most effective and thorough treatment.
The largest advantage that sandblasting services can provide is the deep cleaning of metal to ensure a smooth prepared surface. Consider the effect that is created when you scrub a piece of metal with a piece of sandpaper, all of the scratches that are created on the surface. These scratches are what helps the powder coating adhere correctly to the metal and create a professional finish. Called a profile, the powder adheres by seeping into the small impressions made in the metal, creating a stronger bond than a smooth surface could provide. While a profile can be achieved with sandpaper, sandblasting is overall move efficient, and it will take less time.
Sandblasting, especially on complex items, is more thorough as it is able to reach smaller areas where sandpaper simply couldn’t. Additionally, a sandblasting service creates a uniform finish that would be harder to achieve by hand. If areas are uneven, the application process can be hindered, allowing the coating to adhere poorly in certain areas. If you were to forgo a surface profile altogether delamination can occur, in which the powder coating will simply peel off.
Powder coating is a great option for many components; however, without sandblasting the quality of the finish can drop dramatically. If you’re considering this options for your industry, keep sandblasting in mind to ensure you receive the quality finish that you deserve.