Application of Nd:YAG and CO2 Lasers for Cleaning the Corrosion of Bronze and Copper Historical Objects

Ahmadi, Sh; Farniashalmani, F; Malaki, M.H; Vatandoost, R; Ghazian, M; Nikzad, L

Application of Nd:YAG and CO2 Lasers for Cleaning the Corrosion of Bronze and Copper Historical Objects

Document Type : Research Paper

Authors

Sh Ahmadi

F Farniashalmani

M.H Malaki

R Vatandoost

M Ghazian

L Nikzad

Abstract

As in restoration and conservation of historical objects removing the corrosive salts from historical metal surfaces is important, the application of two types of lasers for removing corrosive salts from several historical copper and bronze species has been investigated. The purpose of this research is to compare the results of Nd:YAG and CO2 lasers application with defined pulses and energies in removing corrosive salts. Two mechanisms including dry laser and steam laser cleaning have been used. Also, the traditional methods (chemical and mechanical) have been used to compare the results of the cleaning. The applications of the applied lasers have been shown that CO₂laser at 10.6mm gives the best results.

Highlights

نگهداری و مرمت آثار هنری و 1. تـاریخی،“ (ترجمـة دکتـر رسـول وطن دوست). تهران : انتشـارات

دانشگاه هنر. (تاریخ انتشار به زبان اصلی 1912)، (1376).

M. Cooper, “Laser cleaning in conservation,” Butter-Worth-Heinemann, 7 (1998).
A.C. Tam, W.P. Leung, W. Zapka, W. Ziemlich, “Laser cleaning techniques for removal of surface particulate,” J, Appl. Phys, 71(7) (1992).
A.M.Prokhorov, V.I Konov, I. Ursu, I.N. Mihailescu, “Laser heating of metals,” Adam Hilger.Bristol, 18 (1990).
J.F. Ready, “Effects of high-power laser radiation,” London: Academic Press, 73 (1965).
K.Nakamota, “Infrared spectra of inorganic and coordination compounds,” John Wiley & Sons, 67 (1963).
W.W. Dudely, “CO2 laser: effects and applications,” London: Academic Press, 345 (1970).
E. Grunwald, D.F. Dever, F. Kean, “In high-power infrared laser chemistry,” Russian translation Moscow, 45 (1981).

Keywords

bronze

copper

corrosive

dry laser cleaning

steam laser cleaning

Nd:YAG laser

CO2 laser

traditional methods (chemical and mechanical)

historical objects

نگهداری و مرمت آثار هنری و 1. تـاریخی،“ (ترجمـة دکتـر رسـول وطن دوست). تهران : انتشـارات

دانشگاه هنر. (تاریخ انتشار به زبان اصلی 1912)، (1376).
1. M. Cooper, “Laser cleaning in conservation,” Butter-Worth-Heinemann, 7 (1998).
2. A.C. Tam, W.P. Leung, W. Zapka, W. Ziemlich, “Laser cleaning techniques for removal of surface particulate,” J, Appl. Phys, 71(7) (1992).
3. A.M.Prokhorov, V.I Konov, I. Ursu, I.N. Mihailescu, “Laser heating of metals,” Adam Hilger.Bristol, 18 (1990).
4. J.F. Ready, “Effects of high-power laser radiation,” London: Academic Press, 73 (1965).
5. K.Nakamota, “Infrared spectra of inorganic and coordination compounds,” John Wiley & Sons, 67 (1963).
6. W.W. Dudely, “CO2 laser: effects and applications,” London: Academic Press, 345 (1970).
7. E. Grunwald, D.F. Dever, F. Kean, “In high-power infrared laser chemistry,” Russian translation Moscow, 45 (1981).