Method and device for removing paint in water

Abstract

The invention relates to the technical field of laser cleaning, in particular to a method and device for removing paint in water. The method includes: determining the peak impact force intensity of the laser pulse coupled into the paint layer in water according to the acoustic impedance parameters of the laser pulse in water; The coefficient of the contact surface of the layer and the coefficient of the contact surface of the paint layer and the substrate; the energy density range of the laser pulse is determined according to the coefficient of the contact surface of water and the paint layer and the coefficient of the contact surface of the paint layer and the substrate. In practical applications, as long as the selected laser energy density is within the determined laser pulse energy density range, the laser pulse can be used to remove the paint layer in water with high efficiency and high quality.

Description

technical field [0001] The invention relates to the technical field of laser cleaning, in particular to a method and device for removing paint in water. Background technique [0002] In recent years, with the rapid development of optical technology and the continuous improvement of laser performance, it is possible to use laser to remove a large area of ​​paint. [0003] For objects that have been in water for a long time, such as ships and large bridges, the surface coating is often peeled off due to water erosion, and regular inspection and maintenance are required. In order not to affect the quality of the new paint layer, the original paint layer must be cleaned and removed, and the cleanliness of the substrate may even seriously affect the service life of steel products. [0004] In the process of laser removing paint from underwater objects, the selection of laser parameters will greatly affect the removal efficiency and effect of the paint layer. At present, in orde...

AI Technical Summary

Problems solved by technology

In order not to affect the quality of the new paint layer, the original paint layer must be cleaned and removed, and the cleanliness of the substrate will even seriously affect the service life of steel products

[0004] In the process of laser removing paint from underwater objects, the selection of laser parameters will greatly affect the removal efficiency and effect of the paint layer

At present, in order to improve the paint removal effect, a liquid confinement layer is often added to the side of the paint layer close to the water. Through a large number of experiments to find out the appropriate laser parameters for paint removal, it is time-consuming and laborious, and the efficiency is very low.

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