Important Explorations on Surface Corrosion of the Copper Coins Sourced from the Qing Dynasty

Figure 3

Typical microscopic surface morphologies of corroded coins observed using FESEM: Kx (a), Jq (b), Dg (c), and Tz (d); an inset in Figure 3(a) showing the EDS profile of corrosion product of the Kx.

(a)

(b)

(c)

(d)