Investigations methods to study corrosion of some ancient Islamic copper coins at Faculty of arts museum, Sohag university, Egypt
Abstract
Through the time, copper affected by deterioration factors that interact with environment. Oxygen causes corrosion of copper artifacts and forms copper oxides, meanwhile it starts to mineralize and backs to its natural structure. This research studied five Islamic copper coins at faculty of arts museum in Sohag University by Examination and Analytical methods to identify the corrosion nature and its effects on the coins. The Experimental Techniques were used, such as Stereo microscope, X-Ray Radiography, SEMEDX, and XRD. Results show that coins have more cracks and different corrosion layers. The chemical study (EDXXRD) shows that the main element in coins is copper with some other elements such as sulfur, chloride, calcium, magnesium, aluminum, and silicon which can be found in Egyptian soil composition or as blemish in metals compound. The main compounds were copper oxides, Cuprite (Cu2O), and Tenorite (CuO). Copper chlorides as Atacamite, Paratacamite (Cu2(OH)3Cl) as result of Chloride Ions.
Event details
- Event
- MetroArchaeo 2016
- Technical Committee
- TC4
- emma.angelini@polito.it
- Place
- Torino, ITALY
- Time
- 19 October 2016 - 21 October 2016