PSI - Issue 50

ScienceDirect Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com

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Procedia Structural Integrity 50 (2023) 91–99

16th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures (MRDMS 2022) Methods of stabilization of halogenated hydrocarbons during automated physico-chemical cleaning of metal-optics 16th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures (MRDMS 2022) Methods of stabilization of halogenated hydrocarbons during automated physico-chemical cleaning of metal-optics

S. A. Filin a , V. E. Rogalin b , I. A. Kaplunov c * a Plekhanov Russian Economical University, Moscow, 117997 Russia b Institute of Electrophysics and Electric Power, RAS, St. Petersburg, 191186 Russia c Tver State University, Tver, 170100 Russia S. A. Filin a , V. E. Rogalin b , I. A. Kaplunov c * a Plekhanov Russian Economical University, Moscow, 117997 Russia b Institute of Electrophysics and Electric Power, RAS, St. Petersburg, 191186 Russia c Tver State University, Tver, 170100 Russia

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0 ) Peer-review under responsibility of the scientific committee of the MRDMS 2022 organizers Abstract The results of the study of the possibility of maintaining the physicochemical properties of purified halogenated solvents in a stable state are summarized. Particular attention is paid to the possibility of stabilizing solvents during multiple use. The novelty is to justify the choice of the most effective stable azeotrope to remove contamination. A kinetic analysis of the physicochemical cleaning of metal optics from contaminants by azeotropes was carried out. Diagnostics of the optical breakdown threshold made it possible to find more efficient azeotropes. The results of a study of the possibility of maintaining stable properties of purified halogenated solvents are presented. Ways to increase the stability by obtaining azeotropes of high purity with an inhibitor in the distillation purification of contaminated solvents were investigated and proposed. On the example of metal optics, the fundamental idea of the physicochemical process of metal cleaning as an interconnected process of interaction between the energy characteristics of the washing mixture and the energy characteristics of the surface layer is substantiated. © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the MRDMS 2022 organizers Keywords: cleaning of metal optics, technological pollution, halogenated solvent, laser, optical damage, azeotrope. 1. Introduction One of the current problems of high-tech fields of science and technology is the necessity to clean the surface of precision polished parts (primarily optical) from technological and operational contaminants. This is particularly Abstract The results of the study of the possibility of maintaining the physicochemical properties of purified halogenated solvents in a stable state are summarized. Particular attention is paid to the possibility of stabilizing solvents during multiple use. The novelty is to justify the choice of the most effective stable azeotrope to remove contamination. A kinetic analysis of the physicochemical cleaning of metal optics from contaminants by azeotropes was carried out. Diagnostics of the optical breakdown threshold made it possible to find more efficient azeotropes. The results of a study of the possibility of maintaining stable properties of purified halogenated solvents are presented. Ways to increase the stability by obtaining azeotropes of high purity with an inhibitor in the distillation purification of contaminated solvents were investigated and proposed. On the example of metal optics, the fundamental idea of the physicochemical process of metal cleaning as an interconnected process of interaction between the energy characteristics of the washing mixture and the energy characteristics of the surface layer is substantiated. © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the MRDMS 2022 organizers Keywords: cleaning of metal optics, technological pollution, halogenated solvent, laser, optical damage, azeotrope. 1. Introduction One of the current problems of high-tech fields of science and technology is the necessity to clean the surface of precision polished parts (primarily optical) from technological and operational contaminants. This is particularly

* Corresponding author. Tel.: +7-905-127-5995 E-mail address: kaplunov.ia@tversu.ru * Corresponding author. Tel.: +7-905-127-5995 E-mail address: kaplunov.ia@tversu.ru

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the MRDMS 2022 organizers 2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the MRDMS 2022 organizers

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the MRDMS 2022 organizers 10.1016/j.prostr.2023.10.026