Mechanism and threshold fluence of nanosecond pulsed laser paint removal

Qi, Sun; Zhou, Jing; Meng, Xiankai; Yang, Jianian; Guo, Zhen; Zhu, Ming; Guo, Shun

doi:10.1007/s12598-021-01817-x

Cited by 17 publications

(2 citation statements)

References 32 publications

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“…Laser cleaning technology exploits the advantage of a laser beam with a large energy density and spatial coherence to directly vaporize the oxide film or paint layer on the aluminum alloy surface or to remove the adhesive force holding it to the substrate [ 38 ]. The action mechanism mainly includes the ablation gasification, vibration, and explosion stripping effects [ 39 , 40 ] ( Figure 1 ). Laser cleaning is a highly complex physical and chemical process, and several coupling effects are typically involved in cleaning each substance [ 34 ].…”

Section: The Mechanism Of Laser Cleaningmentioning

confidence: 99%

Research Progress and Challenges in Laser-Controlled Cleaning of Aluminum Alloy Surfaces

et al. 2022

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Aluminum alloys have been widely utilized in automobiles, aircraft, building structures, and high-speed railways industries due to their excellent structural and mechanical properties. Surface oxide film removal prior to aluminum alloy welding and old paint removal prior to repainting aluminum alloy surfaces are critical factors in ensuring the welding quality and service life of aluminum alloy products. Because of its unique advantages, such as environmental protection and precision control, laser-controlled cleaning has great application potential as a surface cleaning technology in removing oxide films and paint layers on aluminum alloy surfaces. In this paper, the mechanism of laser cleaning of oxide films and paint layers on aluminum alloy is discussed. Furthermore, the impact of various processing parameters such as laser beam power, energy density, scanning speed, and so on is analyzed in detail. After laser cleaning, the corrosion resistance, welding performance, adhesive performance, and other properties of the aluminum alloy are optimized. This paper also discusses several real-time detection technologies for laser cleaning. A summary and the development trend are provided at the end of the paper.

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Section: The Mechanism Of Laser Cleaningmentioning

confidence: 99%

Research Progress and Challenges in Laser-Controlled Cleaning of Aluminum Alloy Surfaces

et al. 2022

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“…Tong et al compared the paint removal efficiency of the Gaussian laser and the flat-top laser and found that the paint removal efficiency of the flat-top laser was 20% higher than that of the Gaussian laser [14]. Sun et al found that thermal ablation and thermal vibration at the edge of the cleaning area significantly increased the paint removal width to improve the paint removal efficiency [15]. Lu et al established a nanosecond laser thermal stress cleaning model considering the absorption of the laser by plasma [16].…”

Section: Introductionmentioning

confidence: 99%

Simulation and Experimental Study of Nanosecond Pulse Laser Removal of Epoxy Paint on 6061 Aluminum Alloy Surface

Li,

Dong

et al. 2023

Photonics

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Laser paint removal is a new cleaning technology that mainly removes paint through thermal ablation and mechanical stripping mechanisms. This paper established a thermal-mechanical coupling laser removal model of paint based on the heat conduction equation, Newton’s second law, and Fabbro’s theory. The removal process of epoxy resin paint film on an aluminum alloy surface via a nanosecond pulsed laser was studied using finite element simulations and experimental measurements. The simulation and experimental results show that the nanosecond pulse laser’s primary paint removal mechanism is the mechanical stripping caused by thermal stress and plasma shock. The laser paint removal threshold is 1.4 J/cm2. In addition, due to the different generation times of plasma shock and thermal stress, the mutual superposition of stress waves occurs in the material. This results in a discrepancy between the actual and thermal stress differences. Moreover, the thermal stress difference causes the maximum actual stress difference to fluctuate. The simulation model established in this paper can provide a reference for studying the thermal-mechanical coupling process of laser paint removal.

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Study on the mechanism of multiple physical processes by laser action on coating on aluminium alloy surface

Zhao,

Liu,

Pan

et al. 2023

Opt Quant Electron

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Mechanism and threshold fluence of nanosecond pulsed laser paint removal

Cited by 17 publications

References 32 publications

Research Progress and Challenges in Laser-Controlled Cleaning of Aluminum Alloy Surfaces

Research Progress and Challenges in Laser-Controlled Cleaning of Aluminum Alloy Surfaces

Simulation and Experimental Study of Nanosecond Pulse Laser Removal of Epoxy Paint on 6061 Aluminum Alloy Surface

Study on the mechanism of multiple physical processes by laser action on coating on aluminium alloy surface

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