SURFACE FINISHING SERVICE

Powder Coating

A superior finish for durability and aesthetics. Apply a tough, protective layer to your metal parts, available in a vast spectrum of colors, textures, and finishes.

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A welded sheet metal frame with a clean, gray powder coat finish

The Powder Coating Process: A Step-by-Step Guide

Powder coating is a dry finishing process that creates a hard finish that is tougher than conventional paint. Here’s how it works:

1. Surface Preparation

The metal part is thoroughly cleaned and pre-treated to remove oils, dirt, and oxides. This step is critical to ensure proper adhesion of the powder.

2. Powder Application

A fine powder made of polymer resin and pigments is applied using an electrostatic spray gun. The gun gives the powder a positive electric charge, which is attracted to the grounded metal part.

3. Curing

The part is then placed in a curing oven. The heat causes the powder to melt, flow together, and chemically react to form a durable, cross-linked polymer network, resulting in a high-quality finish.

Why Choose Powder Coating?

Durability: Creates a thick, hard finish that is highly resistant to chipping, scratching, fading, and wear. It provides superior protection compared to wet paints.
Corrosion Resistance: The seamless polymer coating provides an excellent barrier against moisture and humidity, significantly improving the corrosion resistance of the underlying metal.
Aesthetic Variety: Available in virtually any color from the RAL or Pantone systems, with a wide range of finishes including high gloss, matte, satin, metallic, and textured.
Environmentally Friendly: Powder coating is a clean process with negligible volatile organic compounds (VOCs) released into the atmosphere. Unused powder can also be collected and reused.

A sample card showing a variety of color finishes on metal parts

Powder Coating FAQ

What materials can be powder coated?

Powder coating is suitable for any metal that can hold an electrostatic charge and withstand the heat of the curing process. This includes most common metals like Aluminum, Steel, and Stainless Steel.

How much thickness does powder coating add?

A standard powder coat finish typically adds between 0.05 mm to 0.15 mm of thickness per surface. It is very important to account for this thickness in your design, especially for parts that need to fit together or have tight tolerances.

Can you mask features that shouldn't be coated?

Yes. We can use high-temperature masking tape, silicone plugs, and custom masks to protect critical areas like threaded holes, mating surfaces, and electrical grounding points from being coated. Please specify masking requirements clearly on a 2D drawing.