Effect and Mechanism of Energy Density on the Aluminum Alloy Paint Cleaned by Laser

Haichao Zhao; Yulin Qiao; Xian Du; Sijie Wang; Qing Zhang; Yan Zang

doi:10.3788/LOP57.131403

Laser & Optoelectronics Progress, Volume. 57, Issue 13, 131403(2020)

Effect and Mechanism of Energy Density on the Aluminum Alloy Paint Cleaned by Laser

Haichao Zhao¹, Yulin Qiao^1、*, Xian Du¹, Sijie Wang¹, Qing Zhang², and Yan Zang²

¹National Engineering Research Center for Mechanical Product Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China

²Laboratory on Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China

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Figures & Tables(11)

Fig. 1. Schematic of optical fiber laser cleaning device

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Fig. 2. Cleaning method of paint

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Fig. 3. Three-dimensional morphology of cleaning surface after laser cleaning once with different energy densities. (a) 7.32 J/cm²; (b) 8.37 J/cm²; (c) 9.42 J/cm²; (d) 10.46 J/cm²; (e) 11.51 J/cm²; (f) 12.56 J/cm²; (g) 13.60 J/cm²; (h) 14.65 J/cm²

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Fig. 4. Three-dimensional morphology of cleaning surface after laser cleaning twice at different energy densities. (a)-(c) 7.32 J/cm²; (d)-(f) 9.42 J/cm²; (g)-(i) 11.51 J/cm²; (j)-(l) 13.60 J/cm²

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Fig. 5. SEM images of laser cleaning surface with different energy densities. (a)(e) 11.51 J/cm²; (b) 14.65 J/cm²; (c) 7.32 J/cm²; (d) 9.42 J/cm²; (f) 13.60 J/cm²

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Fig. 6. Binding energy spectra for the constituent elements after cleaning twice with energy density of 9.42 J/cm². (a) C 1s; (b) O 1s; (c) Al 2p; (d) Ti 2p

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Fig. 7. Schematic of mechanism of paint removal with laser

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Table 1. Surface roughness of cleaning surface after laser cleaning once with different energy densities
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Table 1. Surface roughness of cleaning surface after laser cleaning once with different energy densities
Energy density /(J·cm^-2) 7.32 8.37 9.42 10.46 11.51 12.56 13.60 14.65
Surface roughness R_a /μm 3.422 3.239 2.976 2.897 1.205 1.557 1.615 1.656

Table 2. Surface roughness of cleaning surface after laser cleaning twice with different energy densities
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Table 2. Surface roughness of cleaning surface after laser cleaning twice with different energy densities
Energy density /(J·cm^-2) 7.32 8.37 9.42 10.46 11.51 12.56 13.60 14.65
Surface roughness R_a /μm 4.196 2.584 1.476 1.426 1.498 1.828 2.219 2.513

Table 3. EDS results of cleaning surface after laser cleaning twice with different energy densities

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Table 3. EDS results of cleaning surface after laser cleaning twice with different energy densities

Different area		Atomic number fraction /%
Different area		C	O	Al	Ti	Si
Original paint	Surface	68.17	30.93	0.12	0.46	0.31
	A	14.98	8.95	75.70	0.21	0.16
	B	17.03	17.89	64.78	0.11	0.19
Fig. 5(c)	C	18.31	15.36	66.04	0.16	0.14
	D	10.21	60.55	29.02	0.17	0.05
	E	61.33	33.78	1.80	1.97	1.12
	A	17.05	8.62	74.17	0.06	0.10
Fig. 5(d)	B	17.71	15.96	66.04	0.16	0.14
	C	22.45	12.50	64.57	0.18	0.31
	A	20.22	7.21	72.40	0.05	0.13
Fig. 5(e)	B	22.04	14.01	63.71	0.11	0.12
	C	24.29	11.36	63.93	0.17	0.26
	A	21.26	6.55	72.06	0.04	0.09
Fig. 5(f)	B	23.45	11.42	65.00	0.06	0.07
	C	28.92	11.17	59.66	0.06	0.18

Table 4. Binding mode of C, O, Al, and Ti on the cleaning surface after laser cleaning twice with energy density of 9.42 J/cm²

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Table 4. Binding mode of C, O, Al, and Ti on the cleaning surface after laser cleaning twice with energy density of 9.42 J/cm²

Element	Binding energy /eV	Binding mode
	283.44	SiC,Al/SiC,SiC/(SiO2+SiC)
C 1s	284.00	C60/Al
	284.90	C
	287.42	C—C、C O
	529.36	TiO2,SiO2
	529.96	TiO2,Al2O3
	530.43	SiO2,TiO2
O 1s	530.82	Al2O3,Al2TiO5,TiO2,TiO,AlOOH
	531.22	Al2O3,AlOOH,MgAl2.3O4.8/SiO2,MgAl2O4,MgO
	531.84	Al2SiO5,Al3N5O3Si3,Mg3H2(SiO3)4,Al2OSiO4
	532.55	SiO2,SiO1.9,SiO2/Si,O—C,C O
	73.00	Al2O3/Al,Al/O2,Al/Al2O3,Al/AlOx
	73.64	Al2O3,Al4C3
Al 2p	74.31	MgAl2.2O4.75,Al2O3,SiO2(Al2O3)0.22,MgAl2.7O5.3/SiO2Al(OH)3
	74.58	Al2OSiO4,MgAl2O5,MgAl2.2O4.9,Al2O3,SiO2(Al2O3)0.55,AlOOH
	75.28	O2/Al
	453.71	AlTi
	454.91	TiN,TiN/SiO2
	457.28	TiS2
Ti 2p	457.60	TiN,TiOS
	458.68	TiO2,Al2TiO5
	462.42	TiOS
	464.14	TiO2

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Haichao Zhao, Yulin Qiao, Xian Du, Sijie Wang, Qing Zhang, Yan Zang. Effect and Mechanism of Energy Density on the Aluminum Alloy Paint Cleaned by Laser[J]. Laser & Optoelectronics Progress, 2020, 57(13): 131403

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Paper Information

Category: Lasers and Laser Optics

Received: Oct. 1, 2019

Accepted: Oct. 28, 2019

Published Online: Jul. 9, 2020

The Author Email: Yulin Qiao (zhchebei@sina.com)

DOI:10.3788/LOP57.131403

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Surface roughness of cleaning surface after laser cleaning once with different energy densities

Table 1. Surface roughness of cleaning surface after laser cleaning once with different energy densities

Table 2. Surface roughness of cleaning surface after laser cleaning twice with different energy densities

Table 2. Surface roughness of cleaning surface after laser cleaning twice with different energy densities

Table 3. EDS results of cleaning surface after laser cleaning twice with different energy densities

Table 3. EDS results of cleaning surface after laser cleaning twice with different energy densities

Table 4. Binding mode of C, O, Al, and Ti on the cleaning surface after laser cleaning twice with energy density of 9.42 J/cm2

Table 4. Binding mode of C, O, Al, and Ti on the cleaning surface after laser cleaning twice with energy density of 9.42 J/cm2

Table 4. Binding mode of C, O, Al, and Ti on the cleaning surface after laser cleaning twice with energy density of 9.42 J/cm²

Table 4. Binding mode of C, O, Al, and Ti on the cleaning surface after laser cleaning twice with energy density of 9.42 J/cm²