Protection of Steel Rebar in Salt-Contaminated Cement Mortar Using Epoxy Nanocomposite Coatings

Figure 5

EIS Nyquist diagram evolution for steel rebars of cement mortar (0.3 wt.% chloride) during immersion for 105 days in 0.1 M NaOH solution: (a) without epoxy coating, (b) with epoxy coating, (c) with nano-Fe₂O₃ modified epoxy coating, and (d) with nano-SiO₂ modified epoxy coating.

(a)

(b)

(c)

(d)