Research Article
Evaluation of Corrosion Inhibition Efficiency of Aluminum Alloy 2024 by Diaminostilbene and Azobenzene Schiff Bases in 1 M Hydrochloric Acid
Table 4
EIS data using SDS and SDA as inhibitors.
| Electrochemical impedance spectroscopy data |
| Inhibitor | Concentration (ppm) | (Ω cm-2) | (Ω cm-2) | (Ω cm-2) | (Hcm-2) | ω (Hz) | CPE (μF cm-2) | | Cdl (μF cm-2) | % | SDS | 0 | 1.14 | 09 | 1.41 | 26.1 | 3.7 | 119 | 0.8805 | 67 | — | 25 | 1.19 | 34.0 | 22.1 | 113 | 27 | 34 | 0.9138 | 24.1 | 73.5 | 50 | 1.29 | 38.5 | 30.2 | 141 | 35 | 29 | 0.9216 | 22.3 | 76.6 | 75 | 1.34 | 45.2 | 45.3 | 167 | 46 | 25 | 0.9281 | 19.1 | 80.1 | 100 | 1.38 | 52.9 | 52.4 | 291 | 51 | 22 | 0.9299 | 14.3 | 83.0 | SDA | 25 | 1.29 | 40.5 | 11.3 | 161 | 44 | 29 | 0.9251 | 25.7 | 77.8 | 50 | 1.32 | 44.6 | 32.9 | 227 | 55 | 17 | 0.9273 | 13.5 | 79.8 | 75 | 1.38 | 52.0 | 39.3 | 281 | 62 | 15 | 0.9288 | 12.1 | 82.8 | 100 | 1.43 | 66.7 | 40.3 | 301 | 71 | 13 | 0.9332 | 9.8 | 86.5 |
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