Zhenglong Lei, Haoran Sun, Ze Tian, Taiwen Qiu, Cheng Cheng, Shuangchao Fu, Kai Li. Effect of Laser at Different Time Scales on Cleaning Quality of Paint on Al Alloy Surfaces[J]. Chinese Journal of Lasers, 2021, 48(6): 0602103
- Chinese Journal of Lasers
- Vol. 48, Issue 6, 0602103 (2021)
Fig. 1. Fourier infrared absorption spectrum analysis for paint coatings
Fig. 2. Surface morphology of substrate before painting
Fig. 3. Surface residues after millisecond and nanosecond pulse laser cleaning. (a) Surface residues after millisecond laser cleaning for Pc=400 W; (b) stripped paint coating when nanosecond pulse laser power Pn = 150 W
Fig. 4. Macro morphologies of surface after millisecond and nanosecond pulsed laser cleaning. (a) Pc=400 W; (b) Pc=500 W; (c) Pc=600 W; (d) Pn=200 W; (e) Pn=250 W; (f) Pn=300 W
Fig. 5. Composition analysis of sample surface residue after paint removal by millisecond pulsed laser. (a) Micro morphology of residue; (b) residue energy spectrum analysis; (c) diffraction peak of residue obtained by XRD
Fig. 6. Laser coating removal process obtained by high-speed camera. (a) Millisecond pulse laser cleaning process, Pc=500 W; (b) nanosecond pulse laser cleaning process, Pn=200 W
Fig. 7. Micro-morphologies of surface after laser cleaning. (a) Pc=400 W; (b) Pc=500 W; (c) Pc= 600 W; (d) Pn=200 W; (e) Pn=250 W; (f) Pn= 300 W
Fig. 8. Calculation diagram of cleaning area
Fig. 9. Schematic diagrams of laser cleaning paint coated on aluminum alloy surface by different laser. (a) Millisecond pulsed laser; (b) nanosecond pulsed laser
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Table 1. Chemical composition of 2024 Al alloy (mass fraction)%
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Table 2. Experimental parameters of millisecond pulsed CO2 laser and nanosecond pulsed laser for cleaning
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