Table 1. Corrosion Parameters Obtained from Polarization Curves for BTB and DAB Inhibitors.
| inhibitor | concentration (ppm) | βa (mV dec–1) | βc (mV dec–1) | Ecorr (mV vs SCE) | icorr (μA cm–2) | θ | IE% |
|---|---|---|---|---|---|---|---|
| blank | 000 | 193.7 | –150.9 | –804.2 | 9.312 | ||
| BTB | 50 | 109.4 | –142.1 | –779.7 | 3.433 | 0.6313 | 63.13 |
| 100 | 79.7 | –156.9 | –643.5 | 2.405 | 0.7417 | 74.17 | |
| 150 | 103.9 | –192.7 | –617.6 | 1.357 | 0.8542 | 85.42 | |
| 200 | 104.9 | –153.4 | –741.8 | 0.855 | 0.9081 | 90.81 | |
| 250 | 103.4 | –193.3 | –567 | 0.638 | 0.9314 | 93.14 | |
| DAB | 50 | 75.8 | –139 | –711.4 | 2.9143 | 0.6870 | 68.70 |
| 100 | 110.6 | –124.5 | –739 | 2.87 | 0.6917 | 69.17 | |
| 150 | 109.1 | –159.1 | –745.5 | 1.942 | 0.7914 | 79.14 | |
| 200 | 102.3 | –169.7 | –728.5 | 1.854 | 0.8009 | 80.09 | |
| 250 | 71.2 | –155.7 | –742.1 | 1.499 | 0.8390 | 83.90 |