Laser cleaning of archaeologically corroded iron objects with inlays

Prokuratov, Denis; Davtian, A. S.; Vereshchagin, Oleg S.; Kurganov, Nikolai; Samokhvalov, A. A.; Pankin, Dmitrii; Povolotckaia, Anastasia; Shimko, A. A.; Mikhailova, Alexandra; Somov, Pavel A.; Parfenov, V. A.

doi:10.1007/s11082-020-2231-z

Cited by 11 publications

(6 citation statements)

References 22 publications

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“…This new technique seemed very promising for conservation treatments at a time where heritage objects needed cleaning more frequently [2]. Since Asmus' works, many studies on laser cleaning have been conducted and explored the differences induced by changing the laser parameters such as the emitting wavelength, the laser energy, and the pulse duration on different materials and various contaminants including biological colonization (lichens, algae) [3][4][5][6][7][8][9][10][11][12][13][14], black sulphated gypsum crusts [15][16][17][18][19][20][21][22][23][24], dirt and environmental soiling [25], corrosion products [26][27][28][29][30][31][32][33][34], or graffiti [35][36][37][38][39][40][41][42][43][44][45][46][47]…”

Section: The Development Of Laser Cleaning For Heritage Conservationmentioning

confidence: 99%

“…Femtosecond pulse laser cleaning of corroded archaeological copper alloys was studied by Korenberg et al using an excimer laser emitting at 248 nm, but the laser fluence used (0.35 J cm −2 ) was not sufficient to remove the corrosion products [83]. Compared to other conventional cleaning systems, an 800 nm laser with 100 fs pulse duration was found to be the best option to remove corrosion layers from an iron belt pad with gilded silver foil inlay from the ten-thirteenth century, with minimal conversion of goethite into magnetite, and no melting [30]. However, the low repetition rate (10 Hz) made the process highly time-consuming.…”

Section: An Alternative Approach For Laser Heritage Cleaningmentioning

confidence: 99%

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Towards safe and effective femtosecond laser cleaning for the preservation of historic monuments

et al. 2023

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We explore femtosecond laser cleaning of materials used in the construction of historic monuments, such as stone and steel covered in typical contaminants caused by harsh environments that may be found in urban areas. We address the cleaning of these materials from a conservation perspective, taking as examples the preservation and cleaning of iconic structures such as the steel and the granite of the Sydney Harbour Bridge, Hawkesbury sandstone, a popular building material of a variety of monuments in Sydney (Australia), Makrana marble taken from the Soami Bagh Samadh temple of Agra in India, and also graffiti removal. We demonstrate that femtosecond laser pulses can clean a range of different contaminants such as biofilm, environmental soiling, rust, and spray paints, while preserving the integrity of the underlying substrates. Femtosecond laser cleaning is a fast and effective method and a safer alternative to lasers with longer pulse durations for the preservation of historic monuments.

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Section: The Development Of Laser Cleaning For Heritage Conservationmentioning

confidence: 99%

Section: An Alternative Approach For Laser Heritage Cleaningmentioning

confidence: 99%

Towards safe and effective femtosecond laser cleaning for the preservation of historic monuments

et al. 2023

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“…It is also necessary to optimize the laser process parameters and select suitable laser equipment. Prokuratov et al [45] used several kinds of laser to remove the ferric oxide layer and found that nearly every kind of laser could cause the oxide layer to dehydrate into an Fe 3 O 4 layer, which caused the cleaning surface to become dark. Only a Ti:Sa laser with a pulse width of 800 nm and a pulse frequency of 150 Hz could remove the oxide layer without changing surface color, but the cleaning efficiency was very low.…”

Section: Nonmetallic Materialsmentioning

confidence: 99%

The Fundamental Mechanisms of Laser Cleaning Technology and Its Typical Applications in Industry

Zhou

Sun²,

et al. 2023

Processes

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Laser cleaning is an advanced surface-cleaning technology that can lead to the instant evaporation and stripping of the attachments found on a substrate’s surface, such as contaminants, rust, and coatings; it uses a high-energy laser beam to irradiate the components’ surface. Compared with common surface-cleaning technologies, laser cleaning has the advantages of precision, efficiency, and controllability. In this paper, the fundamental mechanisms of laser cleaning technology are summarized in detail; these include the laser thermal ablation mechanism, the laser thermal stress mechanism, and the plasma shock wave mechanism. The operational principles, characteristics, and application range of each mechanism are discussed. Their typical applications in industry are outlined according to the differences in the substrate materials used, including metallic materials, nonmetallic materials, and semiconductor elements. This study provides a significant reference and guiding basis for researchers to further explore the fundamental mechanisms of laser cleaning, as well as various aspects of the typical industrial applications of laser cleaning.

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“…According to above results, it can be concluded that the safe power intensity for the cleaning of ductile iron substrate is about 320 W, corresponding to 10.86 J/cm 2 (1.086 × 10 8 W/cm 2 ), which is close to the calculated result. According to literatures [10,[23][24][25], the thick surface layer can be completely removed by increasing cleaning times. us, in following experiments, average laser power is adjusted to 320 W and other parameters are kept the same with prior experiments.…”

Section: Mathematical Problems In Engineeringmentioning

confidence: 99%

Cleaning of Graphite Particles Embedded in the Surface of Ductile Iron by Using a Novel Method

Jia

Miao

Jiang

et al. 2021

Mathematical Problems in Engineering

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Ductile iron has unique mechanical property and has been widely used in many industrial applications, e.g., engine cylinder covers, crank axles, and machine tool beds and cams. The welding performance of ductile iron is normally influenced by graphite particles in the surface of ductile iron, which needs to be removed before welding. In this article, laser cleaning technique was developed to remove graphite particles implanted in the surface of ductile iron. Laser cleaning parameters and the damage threshold value of the substrate were investigated by using a pulsed Nd: YAG laser. The optimized laser cleaning parameters were obtained to achieve high-quality cleaning effect and avoid the formation of the oxide layer. Surface morphologies and elemental compositions of specimens before and after laser cleaning were characterized by scanning electron microscopy and energy-dispersive X-ray spectroscopy. Results indicated that graphite particles implanted in the surface of ductile iron were removed completely and efficiently by using the pulsed laser without the protection of inert gas atmosphere, and surface oxidation was not observed during the laser cleaning process.

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Laser cleaning of archaeologically corroded iron objects with inlays

Cited by 11 publications

References 22 publications

Towards safe and effective femtosecond laser cleaning for the preservation of historic monuments

Towards safe and effective femtosecond laser cleaning for the preservation of historic monuments

The Fundamental Mechanisms of Laser Cleaning Technology and Its Typical Applications in Industry

Cleaning of Graphite Particles Embedded in the Surface of Ductile Iron by Using a Novel Method

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