300W 5mJ Pulsed Laser Cleaning Case: Before & After Comparison of Wheel Hub Rust & Paint Removal

1. Project Background

Heavy-duty steel wheel hubs are exposed to harsh outdoor working conditions for a long time, covered with thick rust and aged paint layers. Conventional cleaning methods such as grinding and sandblasting generate heavy dust, easily damage the base material and cause environmental pollution. It is difficult to balance cleaning efficiency and substrate protection. In this test, a 300W 5mJ pulsed laser cleaning machine was applied to renovate the wheel hub surface, showing an intuitive before-and-after cleaning comparison.

2. Equipment Introduction

We adopted this portable air-cooled pulsed laser cleaner with 300W power and 5mJ single pulse energy. Equipped with a handheld laser gun for flexible operation, the lightweight unit requires no bulky auxiliary equipment. The pulsed laser vaporizes and peels off rust and coatings in a non-contact way. It is consumable-free and won’t damage the base metal, ideal for rust removal, paint stripping and oxide layer cleaning on metal components.

3. Before & After Cleaning Comparison

• Before Cleaning (Left): The wheel hub was covered with large areas of reddish-brown rust. The old paint peeled and cracked, and rust intertwined with paint, tightly bonded to the steel substrate. Traditional treatment may over-grind and thin the wheel hub base material.
• After Cleaning (Right): Rust and old paint were completely removed. A uniform and intact metal substrate was exposed. The cleaning area is controllable without substrate ablation or pits. The surface cleanliness meets the requirements for subsequent repainting and renovation

4. Advantages of 300W 5mJ Pulsed Laser Cleaning

1. 5mJ single pulse energy for thick rust & composite paint layers: Sufficient pulse energy quickly strips multi-layer contaminants, while pulsed mode limits heat input to avoid metal thermal deformation.
2. Non-contact cleaning: The laser head does not touch the workpiece. No abrasive consumables are needed. Compared with sandblasting or angle grinder polishing, it cuts dust pollution and avoids secondary scratches.
3. Portable air-cooled design: Handheld main unit with built-in cooling fans, supports on-site mobile operation for large or fixed workpieces.
4. Precise control: Adjustable cleaning range, selectively removes rust and paint while preserving sound base metal. Perfect for precision restoration of wheel hubs, molds and steel structures.

5. Conclusion

This wheel hub rust and paint stripping case proves that the 300W 5mJ pulsed laser cleaning delivers outstanding performance on metal surfaces with composite contaminants (rust + old paint). Compared with traditional rust removal processes, laser cleaning balances cleaning quality, operation safety and environmental protection. It serves as an excellent surface renovation solution for heavy parts, steel structures, molds and other workpieces.