Table 3 Potentiodynamic polarization (PDP) parameters for carbon steel in oilfield produced water with and without inhibitors.
Inhibitor | Conc., (mM) | Ecorr mV (vs. SCE) | Icorr., mAcm−2 | βa, mVdec−1 | βc, mVdec−1 | CR µm/Y | IE % |
|---|---|---|---|---|---|---|---|
Blank | – | − 762.5 | 30.521 | 193.6 | − 148.9 | 356.9 | – |
HM − 1228 | 0.001 | − 751.9 | 15.417 | 172.1 | − 103.7 | 180.3 | 49.5 |
0.005 | − 736.1 | 11.645 | 183.5 | − 117.3 | 136.2 | 61.9 | |
0.01 | − 795.2 | 9.0675 | 104.9 | − 134.0 | 106.03 | 70.3 | |
0.05 | − 773.8 | 6.239 | 153.7 | − 181.6 | 72.95 | 79.6 | |
0.1 | − 786.4 | 3.625 | 105.2 | − 141.3 | 42.39 | 88.1 | |
0.5 | − 745.3 | 1.592 | 171.9 | − 119.7 | 18.6 | 94.8 | |
HM − 1227 | 0.001 | − 770.8 | 16.527 | 97.3 | − 163.5 | 193.3 | 45.9 |
0.005 | − 753.2 | 13.376 | 127.5 | − 190.2 | 156.4 | 56.2 | |
0.01 | − 746.3 | 10.764 | 161.4 | − 132.8 | 125.9 | 64.7 | |
0.05 | − 764.1 | 7.0136 | 170.1 | − 159.6 | 82.0 | 77.02 | |
0.1 | − 747.8 | 4.691 | 204.6 | − 147.3 | 54.9 | 84.6 | |
0.5 | − 719.6 | 2.315 | 136.2 | − 125.4 | 27.1 | 92.4 | |
HM − 1226 | 0.001 | − 751.4 | 17.158 | 145.6 | − 181.2 | 200.6 | 43.8 |
0.005 | − 767.3 | 14.327 | 164.9 | − 135.8 | 167.5 | 53.1 | |
0.01 | − 774.6 | 11.541 | 177.3 | − 146.1 | 135.0 | 62.2 | |
0.05 | − 758.2 | 8.1062 | 180.4 | − 159.5 | 94.8 | 73.4 | |
0.1 | − 739.1 | 5.6417 | 196.8 | − 163.4 | 66.0 | 81.5 | |
0.5 | − 784.5 | 3.152 | 143.7 | − 192.0 | 36.9 | 89.7 |
