About Laser Cleaning
Laser cleaning is the controlled removal of surface contaminants — rust, paint, oxides, coatings, grease, and biological deposits — using a focussed laser beam. It is a dry, chemical-free, non-contact process with a level of precision that no other surface preparation technology can match.
The Process
How Laser Cleaning Works
Energy delivery
A pulsed or continuous-wave fibre laser delivers focussed energy to the contaminated surface via a scanning head.
Ablation
The contaminant layer — rust, paint, oxide, scale — absorbs the laser energy and is vaporised or ejected as particulate. The base material has a different absorption coefficient and is largely unaffected.
Extraction
Ablated particles and fumes are captured by an integrated or external fume extraction system, keeping the work area clean and safe.
Clean surface
The result is a clean, prepared surface ready for coating, inspection, welding, or further processing — without chemical residue or substrate damage.
Why Laser
Advantages Over Conventional Methods
No consumables
Unlike sandblasting or chemical stripping, laser cleaning uses no abrasive media, no chemicals, and produces no secondary waste stream.
Non-contact process
The laser beam never physically touches the surface, eliminating mechanical stress and the risk of dimensional distortion.
Substrate selective
Correctly configured, the laser ablates the contamination layer while leaving the base material untouched — critical for precision engineering components.
Precision controllable
Power, pulse duration, frequency, and scan speed are all adjustable to match the specific coating and substrate — giving you repeatable, consistent results.
Environmentally clean
No chemical runoff, no spent abrasive media to dispose of. Fume extraction handles the ablated particles.
Fully automatable
Laser cleaning integrates with robotic cells and automated systems for inline or batch processing in manufacturing environments.
Choosing the Right Technology
Pulsed vs. Continuous Wave
Not all laser cleaning applications are the same. The choice between pulsed and continuous wave technology determines the outcome — matching the technology to the task is where ApexLase adds value.
Pulsed Laser Cleaning
The pulsed laser delivers energy in short, extremely high peak-power bursts. This concentrates the ablation effect on the contaminant while the base material — which conducts heat away between pulses — remains largely unaffected by thermal load.
- Ideal for delicate or thin-walled substrates
- Paint, rust, and light oxide removal
- Restoration work on vehicles, tools, and heritage items
- Mold and die cleaning
- Minimal heat-affected zone
Continuous Wave (CW) Cleaning
The continuous wave laser delivers a constant beam output, maximising energy density over time. This makes it exceptionally fast for heavy contamination on robust substrates where thermal load is not a concern.
- Heavy structural rust and scale removal
- Thick coating stripping from steel
- Pipeline and weld preparation
- High-throughput production environments
- Large surface areas
Comparison
Laser Cleaning vs. Other Methods
| Method | Advantages | Limitations |
|---|---|---|
| Sandblasting | Fast on large areas, low capital cost | Damages substrate, produces huge volumes of spent media, cannot reach complex geometry |
| Chemical Stripping | Can reach complex shapes | Hazardous materials, strict environmental disposal rules, long processing times |
| Dry Ice Blasting | No residue | High consumable cost, noisy, limited on heavy contamination |
| Laser Cleaning | Substrate-safe, no consumables, automatable, precise, clean | Higher capital cost than manual methods; speed depends on wattage chosen |