What are the requirements for LED street light die casting surface treatment for corrosion resistance and aesthetics?

1. The anti-corrosion layer must be dense and uniform.
Anodizing forms a dense oxide film on the aluminum alloy surface, significantly improving corrosion resistance. It can also be colored to meet various aesthetic requirements.
2. Electroplating or powder coating provides secondary protection.
Electroplating (nickel, tin, copper, etc.) or powder coating can form a hard, wear-resistant metal layer on the substrate, further protecting it from moisture and salt spray corrosion.
3. Pre-treatment must ensure substrate quality.
The surface must be free of defects such as pores, cracks, and cold marks. Otherwise, the electroplated layer will easily bubble and fall off, affecting corrosion resistance and appearance.
4. Decorative treatments must also ensure aesthetics.
Spraying, sandblasting, or CVD processes can achieve colorful, matte, or metallic finishes to meet the aesthetic needs of urban landscape lighting.
Why are more and more LED street light housings using aluminum die casting instead of traditional injection molding?

1. Excellent heat dissipation performance
Aluminum alloy has a much higher thermal conductivity than plastic. The die casting process also allows for precise control of wall thickness, ensuring rapid heat transfer to the housing and extending the lifespan of the LEDs.
2. High structural strength and impact resistance
The high-pressure die-cast aluminum alloy housing boasts IK09-level impact resistance, making it capable of withstanding external impacts such as road construction and vehicle collisions.
3. Reliable waterproof and dustproofing
The integrated die-cast structure has no joints and, with an IP66/IP65 rating, provides long-term waterproof and dustproofing, making it suitable for outdoor streetlights in rainy and snowy weather.
4. Dimensional accuracy and batch consistency
Using CAD/CAM/CAE design and automated die casting machines (such as the Lijin 1600T series), we can achieve dimensional tolerances of ±0.02mm, ensuring consistent assembly and fit for each lamp and reducing subsequent commissioning costs.