Table 4 Summary of the equivalent element values according to the immersion time in 0.6 M NaCl and the sample
\({\rm{T}}{\rm{D}}\) (%) | Time (h) | R1 (Ω cm2) | CPE2 (µS sn cm−2) | n2 | R2 (Ω cm2) | CPE3 (µS sn cm−2) | n3 | R3 (MΩ cm2) | W (S s1/2 m−2) | t (s1/2) | Χ2 (10−4) |
---|---|---|---|---|---|---|---|---|---|---|---|
0 | 2 | 3.0 | 32.6 | 0.92 | 2.2 × 105 | 9.5 | 0.90 | 5.1 | – | – | 6.08 |
24 | 3.2 | 22.0 | 0.92 | 1.5 × 105 | 4.4 | 0.66 | 1.7 | – | – | 4.31 | |
48 | 3.1 | 20.5 | 0.93 | 6.6 × 104 | 3.9 | 0.58 | 2.4 | – | – | 2.74 | |
72 | 3.5 | 19.7 | 0.93 | 7.7 × 104 | 3.7 | 0.51 | 3.0 | – | – | 4.19 | |
96 | 2.9 | 19.2 | 0.92 | 6.3 × 104 | 3.6 | 0.61 | 2.5 | – | – | 2.76 | |
25 | 2 | 4.4 | 36.8 | 0.79 | 7.7 | 12.8 | 0.87 | 2.3 × 10−3 | 1.2 × 10−4 | 2.9 × 10−2 | 8.55 |
24 | 3.8 | 25.1 | 0.86 | 10.2 | 30.3 | 0.85 | 77.0 | 2.3 × 10−6 | 12.0 | 4.38 | |
48 | 3.4 | 32.6 | 0.88 | 7.7 | 35.0 | 0.84 | 0.5 | 3.2 × 10−6 | 263.0 | 3.40 | |
72 | 2.9 | 39.7 | 0.88 | 11.8 | 23.2 | 0.85 | 0.1 | 5.5 × 10−6 | ∞ | 2.65 | |
96 | 3.2 | 64.0 | 0.87 | 16.2 | 12.8 | 0.87 | 0.3 | 6.3 × 10−6 | ∞ | 14.80 | |
50 | 2 | 3.2 | 12.5 | 0.82 | 2.0 | 46.0 | 0.86 | 0.2 | 9.7 × 10−6 | 4.6 | 5.60 |
24 | 5.8 | 27.2 | 0.88 | 14.0 | 17.0 | 0.87 | 9.0 | 1.6 × 10−3 | 331.0 | 7.93 | |
48 | 10.6 | 25.7 | 0.88 | 23.9 | 15.2 | 0.86 | 36.0 | 5.0 × 10−6 | 6.0 | 8.17 | |
72 | 6.2 | 21.6 | 0.87 | 5.9 | 15.8 | 0.87 | 3.0 × 10−2 | 1.4 × 10−2 | 1.2 × 10−4 | 3.28 | |
96 | 5.0 | 21.6 | 0.86 | 4.8 | 14.5 | 0.88 | 0.4 | 3.2 × 10−3 | 5.5 × 10−4 | 3.72 | |
75 | 2 | 3.4 | 86.1 | 0.87 | 12.3 | 12.8 | 0.94 | 1.4 | 5.3 × 10−4 | 4.5 × 10−2 | 4.61 |
24 | 3.8 | 44.5 | 0.92 | 7.3 | 9.4 | 0.85 | 1.9 | 1.6 × 10−3 | 2.4 × 10−2 | 6.59 | |
48 | 3.5 | 62.2 | 0.88 | 7.2 | 45.3 | 0.87 | 1.4 | 1.8 × 10−3 | 0.4 | 4.88 | |
72 | 3.4 | 72.3 | 0.87 | 9.4 | 35.0 | 0.89 | 1.2 | 2.2 × 10−4 | 0.2 | 4.83 | |
96 | 3.4 | 65.2 | 0.88 | 8.2 | 40.1 | 0.87 | 1.2 | 3.3 × 10−3 | 1.6 × 10−2 | 3.80 | |
91 | 2 | 6.2 | 1.7 | 0.80 | 7.1 | 74.7 | 0.88 | 1.3 | 1.1 × 10−2 | 1.3 × 10−3 | 7.23 |
24 | 3.6 | 1.6 | 0.66 | 19.0 | 94.1 | 0.87 | 1.6 | 19.3 | 1.2 × 10−4 | 5.42 | |
48 | 4.3 | 1.1 | 0.68 | 19.0 | 84.6 | 0.88 | 1.5 | 0.5 | 5.9 × 10−4 | 5.30 | |
72 | 3.2 | 1.4 | 0.68 | 17.9 | 90.3 | 0.87 | 1.2 | 0.3 | 3.5 × 10−4 | 4.86 | |
96 | 7.0 | 0.9 | 0.78 | 10.9 | 84.9 | 0.88 | 1.1 | 1.0 × 10−2 | 1.0 × 10−2 | 4.51 |