Furniture Tube Color: Industry Standard for Tube Surface Treatment

I. Standard Process Flow: Pre-treatment Steel Tube Powder Coating

1. Substrate Treatment
Furniture tubes are typically made of low-carbon steel and undergo electro-galvanizing (EG) or hot-dip galvanizing combined with phosphating pre-treatment. This step not only provides long-lasting rust protection for the inside and outside of the tube but also creates a micro-roughened surface, greatly improving coating adhesion.

2. Coating and Curing
Thermosetting polymer powder is uniformly adsorbed onto the tube surface using electrostatic spraying technology, followed by high-temperature baking and curing. This ultimately forms a continuous, dense, and high-hardness plastic coating, achieving comprehensive protection.

II. Five Core Advantages of Powder Coating

1. Superior Durability: The coating possesses exceptional resistance to peeling, scratches, UV fading, and chemical corrosion, offering comprehensive protection far exceeding that of traditional liquid paints.

2. Economic Efficiency at Scale: Suitable for automated production lines, excess powder can be recycled and reused during the spraying process, resulting in high material utilization and significantly reduced mass production costs.

3. Aesthetics and Design Flexibility: Supports the full RAL color family and custom colors, offering diverse surface finishes: including high gloss, matte, satin, metallic, textured, and even special wrinkle effects, meeting diverse design needs.

4. Environmental Protection and Safety: Free of VOCs (volatile organic compounds), with no harmful gas emissions, ensuring worker health and compliance with increasingly stringent environmental regulations.

5. Uniform Coverage: Electrostatic adsorption ensures uniform coating coverage of all parts of the workpiece, including edges, welds, and other difficult-to-reach areas, preventing uneven film formation or missed areas.

III. Classic Application: Matte/Satin Black Galvanized Steel Pipes

Among all powder coating applications, **galvanized steel pipes paired with matte or satin black coatings** have become the most common and classic combination, widely used in:

- Office chair bases and structural components

- Bed frame structural tubing

- Table and chair legs

- Shelving and storage systems

- Commercial space furniture

The reasons for this popular choice are as follows:

Neutral and Modern: Black has broad compatibility and suits various styles.

Practical and Inclusive: Effectively conceals minor surface imperfections, reducing the rate of appearance defects.

Durable and Aesthetically Pleasing: Not easily outdated, maintaining the visual stability of the product.

IV. Industry Outlook

As the furniture industry continues to raise its requirements for quality, environmental protection, and aesthetics, powder coating technology continues to evolve. Future innovations are expected in low-temperature curing, richer texture effects, and intelligent coating lines, consolidating its core position in the field of furniture hardware surface treatment.

In summary, powder coating, with its comprehensive performance, economic advantages, and environmental benefits, has become an irreplaceable process for surface treatment of furniture tubing, and has laid a solid foundation for the high-quality and sustainable development of the industry.