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pourzarghan V, Bakhshandefard H, Ebrahimi A. (2025). Feasibility of using white Fig Sap (Ficus carisa)and Sidr Honey Synergistically as Corrosion Inhibitors for Ancient Alloys Composed of Cu-10Sn. JRA. 11(1), doi:10.61186/jra.11.1.440
URL: http://jra-tabriziau.ir/article-1-440-en.html

Bronze disease is one of the most significant threats affecting historical bronzes. Neglecting bronze artifacts suffering from this condition can lead to their destruction and obliteration. Consequently, numerous strategies have been proposed in the field of bronze artifact conservation. However, over time, these methods have either caused further damage to the objects or have been less favored due to their excessively high costs. One of the most important methods proposed for treating bronze disease is the use of corrosion inhibitors. Nevertheless, considering the toxicity and carcinogenicity of these substances, the issue can be partially addressed by replacing them with natural materials. The aim of this research is to investigate the feasibility of using eco-friendly inhibitors, specifically white fig sap (Ficus carica) and natural honey, synergistically on a Cu-10Sn alloy in the presence of a 0.5 M sodium chloride corrosive medium. Based on potentiometric measurements, the corrosion rate when using these inhibitors synergistically at a concentration of 1800 ppm is 14.6, indicating an inhibition efficiency of 50%. This inhibition is characterized as anodic polarization type. In the weight loss method, the inhibition efficiency was also reported as 50% in the presence of the corrosive medium at the fourth week. SEM-EDX analysis showed a reduction in the amount of chloride corrosion products. However, the most significant factor observed in the scanning electron microscope images is pitting corrosion and severe phase separation in the matrix of these simulated ancient alloys