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Heritage Science
Figure 3 | Heritage Science

Figure 3

From: The sulfidation process of sterling silver in different corrosive environments: impact of the process on the surface films formed and consequences for the conservation-restoration community

Figure 3

EDX spectra collected on the general area of the presented images (Figure 2) show in both cases no S but an enrichment in Cu and O, moderate in the residential environment (Cu 9.6, O 1.2, S 0.1 and Ag 89.1 wt%), but strong in the laboratory environment (Cu 20.8, O 15.7, N 2.5, S 0.1 and Ag 60.9 wt%). Reference values for a non-exposed sample is Cu 5.3 and Ag 94.6; O, N and S: 0.0 wt%). A summarizing table is given at the end of the ‘Results’ part.

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