Research Article
Evaluation of Nitrilotrimethylene Phosphonic Acid and Nitrilotriacetic Acid as Corrosion Inhibitors of Mild Steel in Sea Water
Table 1
Corrosion parameters of mild steel in sea water in presence of inhibitors at 298 K.
| Concentration (ppm) | − (mV) | (A/cm2) | (mV/dec) | (mV/dec) | Inhibition efficiency ( %) |
| 0 | 564 | 53.0 | 255 | 145 | — | 3 NTP | 590 | 13.5 | 320 | 125 | 74.5 | 30 NTP | 555 | 11.0 | 315 | 125 | 79.2 | 100 NTP | 550 | 6.5 | 310 | 125 | 87.7 | 300 NTP | 585 | 8.0 | 305 | 135 | 84.9 | 3 NTA | 644 | 32.0 | 180 | 115 | 39.6 | 30 NTA | 638 | 29.0 | 180 | 115 | 45.3 | 100 NTA | 630 | 27.0 | 180 | 115 | 49.1 | 300 NTA | 625 | 25.5 | 180 | 125 | 51.9 |
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