Table 3 The electrochemical polarization parameters of (Bi, Pb)-2223 superconductor compacted at different pressure in 0.5 M HCl, 0.5 M NaOH and 0.5 M NaCl.
Pressure, GPa | E corr vs SCE, mV | βa | βc | icorr, mA/cm2 | |
|---|---|---|---|---|---|
mV/decade | |||||
0.5 M HCl | 0.3 | 745 | 390 | 265 | 0.2120 |
0.7 | 841 | 377 | 425 | 0.1964 | |
1.0 | 873 | 344 | 520 | 0.1017 | |
1.4 | 876 | 420 | 444 | 0.0619 | |
1.9 | 879 | 499 | 333 | 0.0319 | |
0.5 M NaOH | 0.3 | 174 | 244 | 128 | 0.0238 |
0.7 | 155 | 183 | 204 | 0.0045 | |
1.0 | 150 | 168 | 182 | 0.0019 | |
1.4 | 159 | 168 | 194 | 0.0014 | |
1.9 | 156 | 159 | 133 | 0.0014 | |
0.5 M NaCl | 0.3 | 112 | 335 | 112 | 0.0138 |
0.7 | 110 | 452 | 183 | 0.0101 | |
1.0 | 182 | 430 | 142 | 0.0042 | |
1.4 | 231 | 362 | 166 | 0.0021 | |
1.9 | 277 | 308 | 120 | 0.0008 | |
