تحلیل بحران برپایۀ سنجش عوامل مؤثر بر خوردگی فعال و ارزیابی بحران در مجموعه‌های برنزی باستانی

Recently risk assessment and management in cultural-historical collections is one of the important subjects in the field of preventive conservation research. Different methods and aspects of are used and studied in the field of risk assessment in archaeological sites and collections and significant results are achieved and published in last decades. One of the types of archaeological collections is metal collections that may be found in archaeological excavations. In this paper, application of risk assessment approach is investigated to estimate conservation condition in archaeological bronze collection. This approach is concentrated on occurrence of active corrosion (bronze disease) and factors influencing it during burial time and post-excavation period. Thus, the results of analyses based on an analytical system is considered that is performed previously (Metal-Environment-Corrosion system) including identification of soil environment, characterization of corrosion mechanism and their effect on conservation condition in bronze objects. For this purpose, two bronze collections are studied that are discovered from Haft Tappeh and Sangtarashan sites from Iran. The condition of two collections is assessed consisting of identification of risks and deterioration factors influencing bronze objects during excavation operation as well as post-excavation preservation and risk assessment based on occurrence of active corrosion in the collections. Finally, conservation condition and excavation procedure and preservation of the collections are estimated and analyzed based on the corrosion mechanism occurred in the objects and results of risk assessment in soil and museum environments.