Research on high-repetition-frequency and high-power nanosecond laser cleaning technology

With the advantages of safety, non-contact operation, high precision and real-time feedback, laser cleaning technology plays an important role in the field of intelligent manufacturing. In this study, a nanosecond pulsed laser with a wavelength of 1064 nm, a repetition frequency of 20 kHz, a pulse width of 70 ns, an average power of 3000 W, and a spot size of 40 mm*0.5 mm was used as the laser cleaning light source. Additionally, a laser cleaning prototype was constructed with a three-dimensional gantry displacement platform. With a scanning speed of 160 mm/s, a spot interval of 25 mm, and a laser energy density of 750 mJ/cm² , the oxide film on the surface of marine steel was completely removed, achieving a good cleaning effect and a cleaning efficiency of up to 20 m² /h. The entire cleaning process was achieved without dust emission. Our high-repetition-frequency, high-power nanosecond laser cleaning prototype is highly effective in removing rust from marine corrosion class B steel.