Table 2 Electrochemical impedance spectroscopy parameters for copper in SAR solution without and with the addition of ibuprofen.
From: Ibuprofen as a corrosion inhibitor for copper in synthetic acid rain solution
Inhibitor, M | Rs, Ω cm2 | Rf, Ω cm2 | Rct, Ω cm2 | Cf, μF cm−2 | n1 | Cdl, μF cm−2 | n2 | W, Ω−1 cm−2 s0.5 | IE,% | χ2 |
|---|---|---|---|---|---|---|---|---|---|---|
/ | 125.6 | 900.9 | 998.6 | 0.353 | 0.70 | 74.5 | 0.50 | 102.4 | / | 1.0·10−3 |
5·10−4 | 51.54 | 3278 | 1893 | 0.251 | 0.79 | 1.15 | 0.78 | 236.1 | 63.2 | 1.3·10−3 |
1·10−3 | 92.68 | 19830 | 27840 | 0.310 | 0.83 | 0.213 | 0.74 | 2423 | 96.0 | 1.1·10−3 |
5·10−3 | 50.25 | 39470 | 29200 | 0.182 | 0.89 | 0.349 | 0.76 | 3890 | 97.2 | 1.0·10−3 |
1·10−2 | 60.07 | 31610 | 39090 | 0.113 | 0.89 | 0.059 | 0.72 | 5549 | 97.3 | 1.2·10−3 |
