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تمثال صغير لأسد وعملتان عثر عليهما في حفائرموقع الخريبة (دادان) الأثري في مدائن صالح بالمملكة العربية السعودية في موسمي الحفائر الثاني والتاسع 1426هــ / 2005م و1433هــ / 2012م، وهي في حالة تلف شديدة، إذ تغطيها تماما نواتج الصدأ المختلطة ببقايا التربة، وتكلسات من التربة تشوه شكلها بحيث لا يمكن إدراك تفاصيل السطح الأصلي لها. وهي في حاجة إلى فحص وصيانة لكشف تفاصيل أسطحها. وقد تم فحصها وتحليلها لمعرفة تركيبها الكيميائي، والتعرف إلى طبيعة طبقة الصدأ، وتشخيصها فيزيائيا وكيمائيا، وذلك باستخدام أساليب فحص وتحليل مختلفة، مثل: الميكروسكوب الضوئى(""OM Optical microscope) ، والتصوير بالأشعة السينية (X-ray Radiography)، والتحليل بحيود الأشعة السينينة (""XRD X-ray diffraction)، والميكروسكوب الالكتروني الماسح الملحق به وحدة مطياف الطاقة المشتتة ("equipped with energy dispersive spectroscopy "SEM-EDS Scanning Electron Microscopy)
A bronze lion figurine and two coins were discovered at the archaeological site of Al- Kheraibah located within Al-‘Ula in northwestern Saudi Arabia during the excavation seasons 2005 and 2012. They were heavily deteriorating and were completely covered with corrosion output mixed with hardened soil and dirt calcification to such a point that no detail of the original surface could be observed. They needed to be investigated and conserved to understand their surface details. They have been investigated to analyze the chemical composition, and to identify the nature and features of the corrosion layer. Physical, chemical, and structural characterization was performed using Optical Microscopy (OM), X-ray Radiography, X-ray diffractometry (XRD) and Scanning Electron Microscopy (SEM) equipped with energy dispersive spectroscopy (EDS). The nature of the patina was detected by SEM and OM. The surfaces of the objects were covered with a multicolored patina that incorporated or was covered with soil particles, and had many micro-cracks, pits and cavities. EDS and XRD analyses revealed that these objects are made of a Cu-Sn-Pb bronze alloy. They have been buried a long time in sandy soil that allows movement of oxygen and water charged with chloride ions and carbon dioxide, thus contributing to their corrosion. Treatment, inhibition and conservation procedures were carried out to protect the objects against further deterioration. \
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