Influence of water environment on paint removal and the selection criteria of laser parameters
Li-Jun Zhang(张丽君)1, Kai-Nan Zhou(周凯南)2,3, Guo-Ying Feng(冯国英)1, Jing-Hua Han(韩敬华)1,†, Na Xie(谢娜)2,3, and Jing Xiao(肖婧)4
1 College of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China; 2 Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621999, China; 3 Science and Technology on Plasma Physics Laboratory, Mianyang 621999, China; 4 Southwest Institute of Technical Physics, Chengdu 610041, China
Abstract Laser paint removal in a water environment does not diffuse ablation pollution products into air. Characteristics of water, such as high specific heat and heat flux, generate different effects of the laser paint removal than in an air environment. In this study, the effects of air and water environments on the mechanism and effect of laser paint removal are analyzed and compared experimentally and theoretically. In air, thermodynamic ablation causes removal of paint, whereas in water, stress coupled with plasma shock waves cause tear and splash removal of paint layers after fracture and damage. Fracture and pressure thresholds of the paint and substrate, respectively, indicate the optimum energy density range for laser paint removal in water, providing a reference for engineering applications.
Fund: Project supported by the Joint Fund of the National Natural Science Foundation of China and the China Academy of Engineering Physics NSAF (No. U2030108), Sichuan Science and Technology Program (No. 2021YFSY0027), and the National Natural Science Foundation of China (No. U2004162).
Corresponding Authors:
Jing-Hua Han
E-mail: hanjinghua@scu.edu.cn
Cite this article:
Li-Jun Zhang(张丽君), Kai-Nan Zhou(周凯南), Guo-Ying Feng(冯国英), Jing-Hua Han(韩敬华),Na Xie(谢娜), and Jing Xiao(肖婧) Influence of water environment on paint removal and the selection criteria of laser parameters 2022 Chin. Phys. B 31 064205
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