中国物理B ›› 2022, Vol. 31 ›› Issue (6): 64205-064205.doi: 10.1088/1674-1056/ac539b

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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. 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
  • 收稿日期:2021-11-28 修回日期:2022-01-23 接受日期:2022-02-10 出版日期:2022-05-17 发布日期:2022-05-26
  • 通讯作者: Jing-Hua Han E-mail:hanjinghua@scu.edu.cn
  • 基金资助:
    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).

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. 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
  • Received:2021-11-28 Revised:2022-01-23 Accepted:2022-02-10 Online:2022-05-17 Published:2022-05-26
  • Contact: Jing-Hua Han E-mail:hanjinghua@scu.edu.cn
  • Supported by:
    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).

摘要: 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.

关键词: paint removal by laser, water environment, thermal stress, laser plasma

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.

Key words: paint removal by laser, water environment, thermal stress, laser plasma

中图分类号:  (Laser applications)

  • 42.62.-b
79.20.Ap (Theory of impact phenomena; numerical simulation) 81.65.Cf (Surface cleaning, etching, patterning)