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. 2016 May 24;6:26653. doi: 10.1038/srep26653

Table 2. Fitted EIS parameters using the EEC model in Fig. 5 for uncoated and 3CHI3DCF- or 3CHI2DCF-coated AISI 316LVM stainless steel in physiological solution after 1 h, 3 h, 5 h, 7 h, and 10 h of immersion.

Immersion time [h] χ2 RΩ Q1 n1 R1 C1 Q2 n2 R2 C2 W
Uncoated sample
1 0.69 25.08 41.11 0.92 28.46 40.21 98.28 1.00 262.06 98.28 21.03
3 0.05 25.93 36.13 0.92 11.19 31.96 54.68 0.99 584.46 56.24 15.01
5 0.03 26.37 34.48 0.92 13.57 30.97 44.19 0.97 861.78 50.69 14.40
7 0.02 26.60 33.34 0.92 14.12 29.67 40.46 0.95 1116.14 49.53 13.68
10 0.02 26.82 32.13 0.92 15.04 28.68 38.26 0.94 1461.80 48.80 12.93
3CHI3DCF-coated sample
1 0.68 24.96 50.57 0.91 51.86 55.80 92.29 1.00 245.00 92.29 15.66
3 0.23 25.63 44.18 0.91 95.68 50.73 93.10 0.99 519.00 93.77 9.25
5 0.03 26.05 41.31 0.91 98.68 47.23 110.23 0.93 788.55 116.67 7.79
7 0.02 26.25 39.56 0.92 109.79 45.44 88.85 0.93 973.90 96.34 7.26
10 0.03 26.53 37.52 0.92 122.77 43.18 109.03 0.79 1475.50 840.05 7.17
3CHI2DCF-coated sample
1 0.52 25.14 41.31 0.89 23.49 40.54 71.00 1.00 351.30 71.00 15.60
3 0.22 25.96 34.51 0.89 28.50 34.11 56.45 1.00 716.40 56.45 10.89
5 0.23 26.42 32.31 0.89 30.85 32.10 54.81 0.93 1107.50 67.03 9.28
7 0.01 26.61 31.68 0.89 33.67 31.97 47.28 0.86 1370.00 70.62 11.10
10 0.26 26.89 29.69 0.89 47.29 30.83 42.12 0.74 2277.50 180.30 10.73

Units: χ2 [×10−3], R [Ω cm2], R1 and R2 [kΩ cm2], Q1 and Q2 [μΩ−1 cm−2 sn], W [μΩ−1 cm−2 s1/2]; C [μF cm−2] was calculated as Cx = (RxQx)nx/Rx.