Commonly used aluminum square tubes include five grades: 1060, 3003, 5083, 6061, and 6063. 1060 aluminum square tubes have high purity and good plasticity, suitable for simple bending; 3003 has excellent rust resistance, suitable for humid outdoor environments; 5083 has excellent corrosion resistance and weldability, and is often used in marine anti-corrosion structures; 6061 has higher strength and rigidity, and stable load-bearing performance; 6063 aluminum square tubes have excellent surface treatment effects and outstanding decorative texture.
Aluminum square tubes are lightweight, rust-resistant, anti-aging, and weather-resistant. They can be cut and welded, and can also undergo anodizing, spraying, and wire drawing finishes. Widely used in the construction industry, it is used as curtain wall frames, ceiling grilles, door and window frames, and exterior wall decorative frames; in municipal engineering, it is used to make railings, walkway handrails, and landscape pergolas; in industry, it is used to build equipment racks, photovoltaic brackets, and tooling support structures; it is also commonly used in automotive interior frames, kitchen and bathroom hardware, and factory partition frames, combining both decorative aesthetics and structural practicality.
1. Natural Polishing: Polishing to brighten the surface, retaining the original metallic color, with a simple texture, mostly used for internal frames and ordinary hardware components.
2. Anodizing: Forming a protective oxide film, improving corrosion resistance and wear resistance, available in silver-gray, bronze, black, and other color schemes, commonly used for outdoor decoration and railings.
3. Electrostatic Powder Coating: Full and thick paint surface, many colors and styles, resistant to sunlight and fading, suitable for curtain walls, ceilings, and landscape frames.
4. Fluorocarbon Coating: Top-notch weather resistance and corrosion resistance, resisting wind, rain, and ultraviolet rays, suitable for high-rise exterior walls and outdoor projects.
5. Brushed Finish: Creates a fine texture on the surface, giving it a high-end look. Commonly used in interior decoration, furniture, and light luxury commercial frames.
6. Electrophoretic Coating: Creates a uniform and smooth coating with strong adhesion and a refined appearance. Often used for doors, windows, and high-end decorative square tubes.
7. Protective Film Application: Applying a protective film to prevent scratches and oxidation, used for protection during processing and installation.


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Comparison Items: |
Electrostatic powder coating |
Fluorocarbon Coating |
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Coating Raw Materials |
Resin powder coating |
Fluorocarbon Resin Coating |
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Weather Resistance |
Medium coating quality, prone to fading outdoors for 3-8 years |
Extremely strong, outdoor resistance to sunlight and colorfastness for over 15 years |
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Corrosion and Stain Resistance |
Sufficient for daily rust prevention |
Excellent resistance to acids, alkalis, acid rain, and corrosion |
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Surface Texture |
Full and thick paint finish, mostly matte/frosted finish |
Fine and smooth paint film with better gloss and layering |
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Price and Cost |
High cost-performance ratio, relatively low price |
Complex process, higher cost |
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Applicable Scenarios |
Sufficient for interior decoration, general railings, and ceiling grilles |
Suitable for high-rise curtain walls, open-air landscapes, and highly corrosive coastal areas |
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Abrasion Resistance |
Sufficient for daily impact protection |
Higher hardness, superior scratch and wear resistance |

