Precise paint stripping based on photochemical effect by UV laser on honeycomb sandwich panel

Junyi Gu; Xuan Su; Yang Jin; Wenqin Li; Shang Li; Jie Xu; Bin Guo

Journal of Materials Research and Technology (Jul 2023)

Precise paint stripping based on photochemical effect by UV laser on honeycomb sandwich panel

Junyi Gu,
Xuan Su,
Yang Jin,
Wenqin Li,
Shang Li,
Jie Xu,
Bin Guo

Affiliations

Junyi Gu: School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, Shen Zhen 518055, China
Xuan Su: School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, Shen Zhen 518055, China; Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou, 450046, China; Corresponding author. Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou, 450046, China.
Yang Jin: School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, Shen Zhen 518055, China
Wenqin Li: School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, Shen Zhen 518055, China
Shang Li: School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, Shen Zhen 518055, China
Jie Xu: School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, Shen Zhen 518055, China; Key Laboratory of Micro-Systems and Micro-Structures Manufacturing of Ministry of Education, Harbin Institute of Technology, Harbin 150080, China; Corresponding author. Key Laboratory of Micro-Systems and Micro-Structures Manufacturing of Ministry of Education, Harbin Institute of Technology, Harbin 150080, China.
Bin Guo: School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, Shen Zhen 518055, China; Key Laboratory of Micro-Systems and Micro-Structures Manufacturing of Ministry of Education, Harbin Institute of Technology, Harbin 150080, China; Corresponding author. School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, Shen Zhen 518055, China.

Journal volume & issue: Vol. 25
pp. 3768 – 3779

Abstract

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As an environmentally friendly new method for coating removal, laser cleaning has been widely used in aircraft skin paint removal recently. However, due to the thermal damage sensitivity of composite materials, current laser cleaning is still mainly used in aluminum alloy skins. In this work, we demonstrate a method for cleaning the surface paint of honeycomb sandwich structures by ultraviolet picosecond laser. The method achieves layer-by-layer and non-destructive removal of paint from composite surfaces. The results show that the top coat is selectively removed when the laser power is 8 W and the scanning speed is 1750 mm/s. When the laser power is 8 W and the scanning speed is 750 mm/s, both top coat and primer are completely removed without any morphological damage for the glass fiber. The temperature monitoring results show that the UV picosecond laser exhibits low-temperature paint removal. The paint removal mechanism of UV picoseconds is dominated by photochemical effects.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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