Corrosion resistive parameters in 0.5 M H2SO4 and test solution.
| Conc. Of inhibitor (ppm) | −Ecorr (mV vs. SCE) | R P (Ω) | β a (mV dec−1) | β c (mV dec−1) | I corr (μA cm−2) | C-rate (mm year−1) | Inhibition efficiency (η%) | Surface coverage (θ) |
|---|---|---|---|---|---|---|---|---|
| Blank | 0.443 | 3.018 | 0.116 | 0.250 | 0.1036 | 229.8 | 00 | 00 |
| 100 | 0.014 | 3.303 | 0.275 | 0.296 | 0.0217 | 160.3 | 79 | 0.7905 |
| 200 | 0.027 | 3.327 | 0.164 | 0.286 | 0.0131 | 157.2 | 87 | 0.8735 |
| 300 | 0.009 | 4.585 | 0.239 | 0.300 | 0.0121 | 141.1 | 88 | 0.8832 |
| 400 | 0.090 | 4.750 | 0.219 | 0.296 | 0.0114 | 133.5 | 89 | 0.8899 |
| 500 | 0.006 | 5.837 | 0.240 | 0.290 | 0.0097 | 114.1 | 91 | 0.9063 |