Research Article
Corrosion Inhibition Effect of 4-(2-Diethylamino-Ethylsulfonyl)-Phthalonitrile and 4,5-Bis(Hexylsulfonyl)-Phthalonitrile
Table 1
Corrosion values SS in the presence and absence of different concentrations of DAESPN and Bis-HSPN in 3.0 M NaCl medium.
| Electrode | Concentration M | mV | μA | β
a, mV/dec | β
c, mV/dec | IE% | CR, mmpy |
| Bare | — | −56 | 0.418 | 453.2 | 93.2 | — | 5.0 | DAESPN | | −116 | 0.273 | 406.5 | 67.9 | 34.6 | 3.3 | Bis-HSPN | | −4 | 0.171 | 358.9 | 81.4 | 59.0 | 2.1 | DAESPN | | −135 | 0.253 | 354.0 | 67.8 | 39.4 | 3.1 | Bis-HSPN | | −75 | 0.381 | 823.4 | 75.2 | 24.0 | 4.6 | DAESPN | | −55 | 0.305 | 636.7 | 43.8 | 27.0 | 3.7 | Bis-HSPN | | 40 | 0.226 | 577.2 | 24.8 | 46.0 | 2.7 | DAESPN | | 6 | 0.278 | 663.4 | 37.7 | 33.4 | 3.3 | Bis-HSPN | | 18 | 0.293 | 1002.8 | 25.4 | 30.0 | 3.5 |
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