Study on Threshold Value of Laser Cleaning Loose Surface Green Rust Bronzes

Jingfang Cai; Hao Zhou; Ying Yan; Min Wang; Yijing Tang; Ying Yu; Laiming Wu; Lankun Cai

doi:10.3788/LOP202259.1114005

Laser & Optoelectronics Progress, Volume. 59, Issue 11, 1114005(2022)

Study on Threshold Value of Laser Cleaning Loose Surface Green Rust Bronzes

Jingfang Cai¹, Hao Zhou², Ying Yan¹, Min Wang¹, Yijing Tang¹, Ying Yu¹, Laiming Wu², and Lankun Cai^1、*

¹State Key Laboratory of Environmental Protection for Environmental Risk Assessment and Control of Chemical Process, East China University of Science and Technology, Shanghai 200237, China

²Shanghai Museum, Shanghai 200050, China

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Figures & Tables(20)

Fig. 1. Bronze sample for experiment

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Fig. 2. EDS spectrum of surface before cleaning

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Fig. 3. Morphology comparison before and after dry LQS cleaning

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Fig. 4. Raman characterization of dry LQS cleaning process

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Fig. 5. Morphology comparison before and after dry SFR cleaning. (a) Morphology comparison before and after cleaning; (b) ablation area

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Fig. 6. EDS spectra after dry cleaning under different pulse modes. (a) LQS; (b) SFR

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Fig. 7. Morphology comparison before and after wet LQS cleaning

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Fig. 8. Raman characterization of wet LQS cleaning process

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Fig. 9. Morphology comparison before and after wet SFR cleaning

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Fig. 10. Raman characterization of wet SFR cleaning process

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Fig. 11. EDS spectra after wet cleaning under different pulse modes. (a) LQS; (b) SFR

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Fig. 12. Morphology comparison of agar gel before and after LQS cleaning

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Fig. 13. Raman characterization of LQS cleaning process of agar gel

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Fig. 14. Morphology comparison of agar gel before and after SFR cleaning

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Fig. 15. Raman characterization of SFR cleaning process of agar gel

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Fig. 16. EDS spectra of agar gel after cleaning under different pulse modes. (a) LQS; (b) SFR

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Table 1. Element contents before cleaning
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Table 1. Element contents before cleaning
Element C 0 Si Pb Cl Sn Cu Ca S
Atomic fraction /% 18.77 46.98 0.19 1.19 0.21 0.34 26.31 0.28 4.75

Table 2. Element contents after dry cleaning (atomic fraction,%)
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Table 2. Element contents after dry cleaning (atomic fraction,%)
Pulse mode C 0 Si Pb Cl Sn Cu
LQS 16.67 35.17 4.31 0.63 3.80 0.16 39.25
SFR 3.71 45.79 0.47 1.04 0.72 10.23 38.03

Table 3. Element contents after wet cleaning (atomic fraction, %)
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Table 3. Element contents after wet cleaning (atomic fraction, %)
Pulse mode C 0 Si Pb Cl Sn Cu Ca
LQS 7.10 22.49 0.53 0.45 3.91 0.33 65.19 -
SFR 21.68 34.01 - 3.59 0.13 0.47 39.22 0.27

Table 4. Element contents of agar gel after cleaning (atomic fraction, %)
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Table 4. Element contents of agar gel after cleaning (atomic fraction, %)
Pulse mode C 0 Si Pb Cl Sn Cu Ca S
LQS 46.22 31.08 0.26 0.73 0.14 0.85 18.90 0.48 1.12
SFR 25.73 40.66 1.25 0.70 0.44 - 24.01 0.28 4.33

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Jingfang Cai, Hao Zhou, Ying Yan, Min Wang, Yijing Tang, Ying Yu, Laiming Wu, Lankun Cai. Study on Threshold Value of Laser Cleaning Loose Surface Green Rust Bronzes[J]. Laser & Optoelectronics Progress, 2022, 59(11): 1114005

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