Table 2.
Specimens | Time (Day) | Rs (Ω·cm2) | Qc (Ω−1·cm−2·sn) | n | Rc (Ω·cm2) | Qdl (Ω−1·cm−2·sn) | n | Rct (Ω·cm2) | χ2 | Equivalent Circuit |
---|---|---|---|---|---|---|---|---|---|---|
Epoxy | 5 | 2799 | 3.33 10−10 | 9.3 10−1 | 2.76 104 | – | – | – | 0.02710 | R(QR) |
15 | 2266 | 3.11 10−10 | 1 | 1.96 104 | 7.65 10−5 | 4.48 10−1 | 1.63 104 | 0.01538 | R(QR)(QR) | |
Epoxy-CaCO3 | 5 | 0.04873 | 4.54 10−11 | 1 | 1.59 105 | – | – | – | 0.02607 | R(QR) |
15 | 132 | 7.10 10−11 | 2.45 10−1 | 9.53 104 | 1.01 10−5 | 1 | 7.16 104 | 0.00910 | R(QR)(QR) | |
Epoxy-3 wt% SLS/CaCO3 | 5 | 750 | 1.22 10−10 | 9.45 10−1 | 5.20 1010 | – | – | – | 0.04723 | R (QR) |
15 | 2930 | 1.09 10−10 | 1 | 5.16 1010 | 1.40 10−5 | 6.12 10−1 | 1.30 1010 | 0.02086 | R(Q(R(QR))) | |
Epoxy-5 wt% SLS/CaCO3 | 5 | 3166 | 9.03 10−11 | 1 | 9.55 1010 | – | – | – | 0.02707 | R (QR) |
15 | 1662 | 1.40 10−10 | 9.79 10−1 | 4.54 1010 | 7.94 10−7 | 9.99 10−1 | 4.36 1010 | 0.03265 | R(Q(R(QR))) |