Research Article
Isomers of Poly Aminophenol: Chemical Synthesis, Characterization, and Its Corrosion Protection Aspect on Mild Steel in 1 M HCl
Table 2
Potentiodynamic polarization parameters for mild steel without and with different concentrations of isomers of aminophenol in 1 M HCl.
| Inhibitor concentration (mg/L) | (mV) | (μA/cm2) | (mV/decade) | (mV/decade) | IE (%) | Corrosion rate (mm/year) |
| PoAP | | | | | | | Blank | 471 | 3710 | 61 | 43 | — | 20.09 | 25 | 434 | 277 | 50 | 75 | 92.5 | 3.21 | 50 | 445 | 254 | 75 | 56 | 93.2 | 2.95 | 100 | 436 | 221 | 72 | 49 | 94 | 2.57 | 250 | 437 | 164 | 70 | 54 | 95.6 | 1.90 | 500 | 443 | 104 | 73 | 56 | 97.2 | 1.21 | PmAP | | | | | | | Blank | 471 | 3710 | 61 | 43 | — | 20.09 | 25 | 439 | 1938 | 77 | 42 | 47.7 | 12.08 | 50 | 452 | 1040 | 56 | 52 | 72 | 8.82 | 100 | 454 | 565 | 76 | 75 | 84.7 | 6.57 | 250 | 444 | 400 | 93 | 59 | 89.2 | 4.65 | 500 | 455 | 364 | 52 | 74 | 90.2 | 4.24 | PpAP | | | | | | | Blank | 471 | 3710 | 61 | 43 | — | 20.09 | 25 | 444 | 1041 | 58 | 41 | 72 | 8.81 | 50 | 466 | 283 | 44 | 75 | 92.4 | 3.98 | 100 | 469 | 196 | 81 | 50 | 94.7 | 2.27 | 250 | 481 | 131 | 71 | 58 | 96.5 | 1.52 | 500 | 458 | 244 | 40 | 51 | 93.4 | 2.84 |
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