Figure 8: SEM images of the specimens tested after 6 h immersion in 3.5 wt.% NaCl at room temperature: (a) Mg-5Al, (b) Mg-5Al-1Sn, (c) Mg- 5Al-2Sn, (d) Mg-5Al-3Sn, and (e) Mg-5Al-4Sn alloys.