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Vol.62, No.2, 73 ~ 81, 2024
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| Title |
| Effect of High-Power Laser Cleaning for Surface Contaminants Removal on SS304L |
| 최수진 Soojin Choi , 유현종 Hyun Jong Yoo , 최지연 Jiyeon Choi , 노지환 Jiwhan Noh , 강희신 Heeshin Kang , 안상훈 Sanghoon Ahn , 박준수 Junsu Park , 최필공 Philgong Choi , 김도현 Dohyun Kim , 김영규 Yeonggyu Kim , 김병주 Byeongju Kim , 전익근 Ikgeun Jeon , 김정오 Jeng O K Im , 손현기 Hyonkee Sohn , 김경한 Kyunghan Kim , 박창규 Changkyoo Park |
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| Abstract |
| In this study, artificially formed corrosion and paint layers on 304L stainless steel (SS304L) specimen were removed using a kilowatt level high-power Nd:YAG laser. A laser power of 1140 W and a pulse duration of 89 ns were used for the corrosion removal, and a laser power of 850 W and a pulse duration of 54 ns were adopted for the paint removal. Surface composition was analyzed via electron probe micro-analysis (EPMA) and x-ray diffraction (XRD) analysis before and after the laser cleaning process, confirming that the corrosion and paint layers were successfully removed from the SS304L surface by the laser cleaning process. The effect of the laser cleaning process on the mechanical properties of SS304L was investigated. The hardness and tensile strength of the laser-cleaned specimens were analyzed to determine their mechanical properties. After the laser cleaning process, the surface hardness was slightly increased up to depths of 250 μm for the corrosion removal and up to 50 μm for the paint removal. However, only marginal changes in tensile strength and elongation were detected after the laser cleaning process. These results confirmed that laser cleaning can effectively remove surface contaminants (i.e., corrosion and paint) on SS304L with only a minimum modification of microstructure and mechanical properties.
(Received 31 August, 2023; Accepted 8 November, 2023) |
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| Key Words |
| Laser cleaning, SS304L, Corrosion removal, Paint removal |
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