Electrochemical Investigation of Corrosion Behavior Heat Treated Al-6Si-0.5Mg-xCu (x = 0, 0.5, 1, 2, and 4 wt%) Alloys

Figure 8

SEM secondary electron image of the damaged surface morphology of as-corroded peak aged Al-6Si-0.5Mg-4Cu alloy (Alloy-5) in 0.1 M NaCl solution. Microstructures at different magnifications indicate severe pits deeper and wider than those observed in Figures 5, 6, and 7.