Paint Removal on the 5A06 Aluminum Alloy Using a Continuous Wave Fiber Laser

Lu, Yao; Yang, Lijun; Wang, Yang; Chen, Hao; Guo, Bin; Tian, Ze

doi:10.3390/coatings9080488

Cited by 33 publications

(4 citation statements)

References 48 publications

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“…The thermal stress produced during the expansion process is stronger than the chemical bond or van der Waals force between the materials and exceeds the adhesion force between the oxide film or paint layer and the substrate. Consequently, the oxide film or paint layer can be peeled off from the surface of the substrate [ 46 , 47 ]. In addition, when the laser beam travels through the oxide film or paint layer and eventually reaches the substrate surface, a portion of it is reflected.…”

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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“…Lu et al used CW laser cleaning technology to clean paint from the surface of aluminum alloy substrates. By analyzing the surface morphology of the substrate after laser cleaning, it was found that when the laser power density is 11.9 W/cm 2 , the performance of the substrate after laser cleaning has better corrosion resistance and surface roughness [11]. Penide et al used a CW laser to remove graffiti from a stone surface and found that the CW mode has a better cleaning effect than the modulated wave mode.…”

Section: Introductionmentioning

confidence: 99%

Simulation and Experimental Study on Continuous Wave Fiber Laser Removal of Epoxy Resin Paint Film on the Surface of 6061 Aluminum Alloy

Li,

Dong

et al. 2024

Photonics

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Paint removal is an essential process in the industrial field. Laser technology provides an effective method of paint removal to replace traditional mechanical and chemical methods. This paper establishes a continuous wave (CW) laser thermal paint removal model based on heat conduction theory and Arrhenius’ law. The paint stripping process of epoxy paint film on the surface of 6061 aluminum alloy via CW laser was studied through simulation and experiment. We found that the carbonization of the paint film during the CW laser paint removal process will inhibit the laser paint removal process. Therefore, the paint removal efficiency of the CW laser is limited. The depth of CW laser paint removal increases linearly with the CW laser power density. However, during the CW laser paint removal process, due to the pyrolysis of the paint film and the reflection of the laser by the substrate, the surface temperature of the material first increases and then decreases. In addition, after laser paint removal, the surface roughness of the material after paint removal is reduced due to the melting of the base material. The model established in this article can provide a theoretical reference for studying the CW laser paint removal process.

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“…However, it should be emphasized here that any increase in laser fluence beyond a threshold might trigger a risk of damaging the substrate. For instance, such an upper bound in terms of laser fluence was reported to be about11.9 W/cm 2 , which induces the excessive ablation of the substrate [31][32][33]. Together with experimental investigations, numerical simulations have also been extensively carried out to understand the underlying mechanism involved in laser cleaning.…”

Section: Introductionmentioning

confidence: 99%

A characterization of laser cleaning painting layer from steel surface based on thermodynamic model

Ding

Wang

et al. 2021

Int J Adv Manuf Technol

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In this study, the environmentally friendly nanosecond ultraviolet (UV) laser is innovatively employed laser cleaning to remove the painting layer from the AH36 steel substrate. The feasibility of UV laser cleaning the painting layer is innovatively proposed and it has been calculated by the model theoretically, followed by elaborating the prominent interaction mechanism of UV laser exactly. The initial cleaning threshold and completely cleaning threshold are 2 J/cm 2 and 5 J/cm 2 , respectively. Afterwards, the UV laser cleaned surface quality is evaluated by the scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), optical microscopy (OM) and optical profiler (OP), respectively. The mechanical properties have enhanced dramatically after laser cleaning and characterized by the Vickers hardness tester and universal testing machine. By varying laser fluences (2, 5, 7 J/cm 2 ) during laser cleaning, microstructures registering various sizes of corrugated shaped, craters and ring-shaped could be acquired. In addition, the mechanical properties analysis including rapid melting, quenching and dislocation density effects illustrates that laser cleaning could effectively increase surface microhardness, tensile strength and bending strength. Thus, laser cleaning method has emerged as a favourable means to strip painting layer in lieu of traditional methods for marine industry as well as this study could promote the development of laser cleaning in the field of marine engineering.

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Paint Removal on the 5A06 Aluminum Alloy Using a Continuous Wave Fiber Laser

Cited by 33 publications

References 48 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 on Continuous Wave Fiber Laser Removal of Epoxy Resin Paint Film on the Surface of 6061 Aluminum Alloy

A characterization of laser cleaning painting layer from steel surface based on thermodynamic model

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