Laser cleaning technology uses a high-energy laser beam to irradiate the workpiece surface, causing contaminants (such as rust, paint, oil, and oxide scale) to absorb energy within an extremely short time and undergo vaporization, expansion, or spallation, thereby achieving thorough cleaning.Its core lies in "selective cleaning"-by precisely controlling laser parameters, the energy density is maintained between the ablation threshold of the contaminant and the damage threshold of the substrate, ensuring that only the contaminant is removed without harming the base material.
Currently, industrial laser cleaning equipment is mainly divided into two categories: pulsed and continuous wave (CW). Pulsed laser cleaners output nanosecond-level short pulses with high peak power and a minimal heat-affected zone, making them suitable for scenarios requiring high substrate protection, such as precision molds, aerospace components, and cultural relic restoration. CW laser cleaners emit light continuously, offering higher cleaning efficiency and better cost-effectiveness, ideal for heavy-duty tasks like large-area rust removal and thick paint stripping.
In terms of equipment selection, laser power is the most critical parameter. 50–100W is suitable for light tasks such as removing light rust from precision parts and mold maintenance; 200–300W can handle medium-thickness rust and weld pre-treatment; 500W and above are designed for large-scale continuous operations such as steel structures and ship hull descaling.Additionally, laser wavelength (commonly 1064nm fiber laser), pulse width, scanning speed, cooling method (air-cooled/water-cooled), and protection rating (IP54 and above) are also important considerations.
Laser cleaning has an extremely wide range of applications. In shipbuilding, it can efficiently remove hull rust and anti-corrosion coatings, achieving cleaning rates of 80–100 m²/hour with quality meeting the Sa2.5 international standard; in automotive manufacturing, it is used for cleaning mold release agent residues from engine blocks and transmission housings; in aerospace, it enables automated, non-destructive cleaning of high-precision components such as turbine blades; it also demonstrates significant advantages in mold maintenance, bridge preservation, cultural relic restoration, and electronic component cleaning.
Compared to traditional sandblasting and chemical cleaning, laser cleaning requires no consumables, produces no secondary pollution, does not damage the substrate, and can be easily integrated with robots for automated operation, gradually becoming the mainstream choice in industrial surface treatment.According to market research forecasts, the global laser cleaning market is expected to reach approximately USD 1.3 billion by 2035, with a compound annual growth rate (CAGR) of about 6.3%.
