Corrosion and Leaching Behaviours of Sn-0.7Cu-0.05Ni Lead-Free Solder in 3.5 wt.% NaCl Solution

Figure 5

Cross-section image of the solders after potentiodynamic polarization test in 3.5 wt.% NaCl solution. (a) Sn; (b) Sn-Pb; (c) Sn-Ag-Cu; (d) Sn-Cu-Ni; (e) Sn-Cu.

(a)

(b)

(c)

(d)

(e)