Protection of Steel Rebar in Salt-Contaminated Cement Mortar Using Epoxy Nanocomposite Coatings
Table 1
Parameters of equivalent circuits for the uncoated and coated neat resin rebar in different chloride cement mortars (0.3 and 0.5 wt.%) after 7, 28, and 56 days in 0.1 M NaOH solution.
Time of ponding (days)
(Ω)
(kΩ)
(F)
(MΩ)
(F)
(kΩ)
(F)
Uncoated, 0.3 wt.% chloride cement mortar
7
108.7
139.7
100.0
28
103.7
47.7
95.5
56
128.7
76.3
99.8
Uncoated, 0.5 wt.% chloride cement mortar
7
136.7
200.0
100.0
28
113.6
43.4
43.4
56
152.8
100.0
100.0
Coated with neat resin, 0.3 wt.% chloride cement mortar
7
348
10.65
22.63
185.6
28
384
3.08
42.2
12.09
56
402
4.12
60.3
3.32
Coated with neat resin, 0.5 wt.% chloride cement mortar
