Silicon bronze is widely used for monuments: corrosion of Cu-3Si-1Mn was studied with respect to Cu-5Sn-5Zn-5Pb during ageing tests (runoff/full immersion) in acid rain. Surface characterisation (FEG-SEM/EDS elaborated through PCA, TEM, Raman, FTIR, profilometry), metal release and EIS measurements were performed. Under runoff conditions, where mechanical action plays a role, the alloys showed comparable corrosion resistance. In full immersion the corrosion rate of Cu-3Si-1Mn was slightly higher than that of Cu-5Sn-5Zn-5Pb, due to the different nature of the corrosion products. Results showed that, compared to Sn oxide/hydroxide, Si tends to form less protective amorphous products, detaching from the surface.
Atmospheric corrosion of Cu-Si-Mn bronze for contemporary art under simulated runoff and continuous immersion conditions / Chiavari, Cristina; Martini, Carla; Balbo, Andrea; Monticelli, Cecilia; Velino, Cecilia; Masi, Giulia; Bernardi, Elena. - In: CORROSION SCIENCE. - ISSN 0010-938X. - ELETTRONICO. - 205:(2022), pp. 110442.1-110442.15. [10.1016/j.corsci.2022.110442]
Atmospheric corrosion of Cu-Si-Mn bronze for contemporary art under simulated runoff and continuous immersion conditions
Chiavari, Cristina;Martini, Carla;Velino, Cecilia;Masi, Giulia;Bernardi, Elena
2022
Abstract
Silicon bronze is widely used for monuments: corrosion of Cu-3Si-1Mn was studied with respect to Cu-5Sn-5Zn-5Pb during ageing tests (runoff/full immersion) in acid rain. Surface characterisation (FEG-SEM/EDS elaborated through PCA, TEM, Raman, FTIR, profilometry), metal release and EIS measurements were performed. Under runoff conditions, where mechanical action plays a role, the alloys showed comparable corrosion resistance. In full immersion the corrosion rate of Cu-3Si-1Mn was slightly higher than that of Cu-5Sn-5Zn-5Pb, due to the different nature of the corrosion products. Results showed that, compared to Sn oxide/hydroxide, Si tends to form less protective amorphous products, detaching from the surface.File | Dimensione | Formato | |
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Accepted Manuscript Cu-Si-Mn Bronze.pdf
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