Research Article
Insight into Anticorrosion Mechanism of Ampicillin on Mild Steel in Acidic Environment: A Combined Experimental and Theoretical Approach
Table 2
Electrochemical impedance factors for mild steel with the concentration range of AMP from 0 to 100 ppm in 1M HCl.
| | Conc. of inhibitor (ppm) | Rs (Ω·cm2) | Rct (Ω·cm2) | CPE (μΩ−1·cm−2) | L (kH) | RL (Ω·cm2) | Rp (Ω·cm2) | n | fmax (Hz) | Cdl (μF·cm−2) | IE (%) |
| | Blank | 1.095 | 11.91 | 267.20 | 18.80 | 3.54 | 13.00 | 0.879 | 19.68 | 149.17 | — | | 20 | 1.088 | 77.54 | 112.00 | 19.59 | 11.88 | 78.32 | 0.897 | 17.13 | 69.17 | 83.41 | | 40 | 1.100 | 87.57 | 85.29 | 21.44 | 3.98 | 88.31 | 0.896 | 12.25 | 54.29 | 85.28 | | 60 | 1.230 | 100.90 | 58.07 | 35.82 | 4.27 | 101.85 | 0.884 | 12.25 | 35.09 | 87.24 | | 80 | 1.326 | 115.40 | 48.23 | 64.00 | 3.90 | 116.52 | 0.831 | 12.25 | 23.15 | 88.85 | | 100 | 1.233 | 129.70 | 34.63 | 76.02 | 2.21 | 130.71 | 0.819 | 12.25 | 15.78 | 90.06 |
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