Cleaning a Tin-Plated Brass Dish Using an Ultrasonic Scaler

Document Type : Original Article

Author

department of conservation and restoration - faculty of fine arts - minia university(Egypt)

Abstract

Abstract:
This research deals with the use of an Ultrasonic Scaler to clean a tin-plated copper dish with floral decorations of flowers and leaves dating back to the late Ottoman era, which is in the collection of the Museum of the Faculty of Applied Arts at Helwan University under No. 254/8.
as well as examination using a scanning electron microscope SEM to study the microscopic grains of alloys and metals, crystal structure and internal corrosion of the dish, the corrosion layer, and the welding alloy, and analysis using  EDX  to identify the composition of the copper alloy and the welding alloy, and it was found that the dish was formed from a Brass alloy (copper and zinc) and the corrosion compounds elements, oxygen, carbon, and the presence of calcium, silicon, resulting from the Atmospheric corrosion and the presence of the tin element, which shows that the dish is coated with a layer of tin. Then, an Ultrasonic Scaler cleaning was used to clean the corrosion layers on a tin-plated brass dish inside the museum. The cleaning was performed using piezoelectric ultrasonic waves with controlled local mechanical head vibration with an energy range of about 9.37:7.25 watts, with the use of ethyl alcohol for cooling during cleaning to avoid the thermal effect and with monitoring using an optical microscope during the cleaning process, which showed good results in cleaning and accuracy and control in cleaning.

Keywords

Main Subjects

References

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