Corrosion rate (CR/mm y−1) and inhibition efficiency (IE%) of Q235 steel immersed in test solution for 7 days.
| Inhibitor | C3 | C5 | C7 | C11 | C18 | |
|---|---|---|---|---|---|---|
| Without | CR | 0.1107 | ||||
| 100 ppm | CR | 0.1189 | 0.1240 | 0.0980 | 0.0726 | 0.0931 |
| IE% | −7.35% | −12% | 11.5% | 34.4% | 15.9% | |
| 300 ppm | CR | 0.1126 | 0.1153 | 0.0896 | 0.0434 | 0.0584 |
| IE% | −1.7% | −4.1% | 19.1% | 60.8% | 47.3% | |
| 500 ppm | CR | 0.1072 | 0.1075 | 0.0825 | 0.0309 | 0.0425 |
| IE% | 3.2% | 2.9% | 25.5% | 72.1% | 61.6% | |
| 750 ppm | CR | 0.1062 | 0.0981 | 0.0617 | 0.0161 | 0.0251 |
| IE% | 4.1% | 11.4% | 44.3% | 85.5% | 77.3% | |
| 1000 ppm | CR | 0.1053 | 0.0901 | 0.0492 | 0.0109 | 0.0179 |
| IE% | 4.9% | 18.6% | 55.6% | 90.2% | 83.8% | |