Powder Coating—Unveiling the Rigorous Process of High-Performance Coatings

November 19, 2025

Why are Provour's metal support legs both sturdy and high-quality?
The secret lies in our large-scale powder coating equipment, which can coat products with a beautiful and robust protective film!

The superior weather resistance and corrosion resistance of powder coating are no accident. It is a standardized system that combines precise technology with rigorous chemical processing.

Provour insists on meeting high standards in every step, laying a lasting and solid foundation for the protection of the products you use.
Unlike traditional spray painting, powder coating provides longer-lasting and more robust corrosion protection.
Powder coating does not require the use of organic solvents, which can effectively reduce environmental pollution, harm to human health, and safety risks such as fire.

Many of our components, such as the round tube legs of chairs, the thick square tube legs of sofas, workshop frames, and table legs, extensively utilize iron powder coating to ensure even and saturated coverage. In addition, we can offer glossy or matte finishes to suit different design requirements, allowing our products to showcase diverse design textures.

For example, the understated burgundy and refreshing olive green of the H Chair are uniquely blended through powder coating to give the product a distinctive soul!

Before painting metal parts, there are many pre-treatments; it's not as simple as just spraying it on!
Here we will introduce the details of our production process. Every step is indispensable in order to create a high-quality product.
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📌The core process can be simply divided into three stages: I. Pretreatment II. Coating III. Curing. However, each stage still involves many complicated steps. Let's take a look:

➊ The purpose of the pretreatment stage is to establish the foundation for the coating, thoroughly clean the surface, and create a basis for adhesion. This stage accounts for 70% of the coating quality.

1▸ Surface sanding and smoothing:
Remove surface impurities such as welding slag and increase the roughness of the metal surface to enhance adhesion.

2▸ Chemical Cleaning and Coating Treatment:
• Degreasing and oil removal | Removes grease, oil, and fingerprints from the surface of parts.
• Wash and rinse with water | Remove degreasing agent residue.
• Chemical Conversion Film Treatment ✨｜Key Step! Forming a dense chemical conversion film on the surface of iron parts is the foundation for paint adhesion, corrosion protection, and rust prevention.
• Wash with pure water | Rinse again with pure water or deionized water to ensure that there are no chemical residues or impurities on the surface.

3▸ Drying:
The parts must be completely dried to remove all moisture before proceeding to the next stage.

➋ Coating Stage 4▸Electrostatic Powder Coating✨: As shown in the picture, the personnel spray powder coating onto the surface of the iron part through an electrostatic spray gun, using the principle of electrostatics to make the charged powder evenly adsorbed on the part.

➌ Curing 5▸ High Temperature Curing ✨:
The workpiece with the adsorbed powder is sent into a high-temperature baking oven (between 180℃ and 220℃) to melt and level the powder and cause a chemical cross-linking reaction to form a strong, continuous and highly adhesive coating.

6▸ Cooling and Inspection:
After the workpiece is removed from the furnace and cooled, quality inspections are performed on the coating thickness, appearance smoothness, color, adhesion, and other aspects.