Research Article
Effect of Diacetyl Monoxime Thiosemicarbazone on the Corrosion of Aged 18 Ni 250 Grade Maraging Steel in Sulphuric Acid Solution
Table 3
EIS data of aged maraging steel in 0.5 M sulphuric acid with and without different concentrations of DAMTSC at various temperatures.
| Temp. (K) | Conc. of inhibitor (10−4) (M) | Ohm·cm2 | Ohm·cm2 | Ohm·cm2 | (10−6) (F) | (10−6) (F) | IE (%) |
| 303 | 0.00 | | 2.8 | 2.80 | | 14490 | | | 1.14 | 1.17 | 5.66 | 6.83 | 874 | 9920 | 59.0 | | 2.85 | 5.37 | 9.38 | 14.75 | 799 | 9762 | 81.0 | | 5.70 | 6.12 | 13.5 | 19.62 | 653 | 1590 | 85.7 | | 8.55 | 7.89 | 17.8 | 25.70 | 509 | 1163 | 89.1 | 308 | 0.00 | | 2.30 | 2.30 | | 87620 | | | 1.14 | | 5.10 | 5.10 | | 10112 | 54.9 | | 2.85 | | 8.87 | 8.87 | | 7566 | 74.2 | | 5.70 | 5.6 | 11.2 | 16.8 | 954 | 6347 | 86.3 | | 8.55 | 7.19 | 11.6 | 18.7 | 765 | 4850 | 87.7 | 313 | 0.00 | | 1.6 | 1.60 | | 113500 | | | 1.14 | | 4.32 | 3.32 | | 23724 | 51.8 | | 2.85 | | 5.75 | 5.75 | | 20880 | 72.2 | | 5.70 | 3.43 | 7.34 | 10.8 | 2417 | 11340 | 85.2 | | 8.55 | 4.2 | 7.9 | 12.1 | 1450 | 10800 | 86.7 | 318 | 0.00 | | 1.4 | 1.4 | | 226570 | | | 1.14 | | 2.7 | 2.7 | | 31326 | 48.1 | | 2.85 | | 4.8 | 4.8 | | 27667 | 70.8 | | 5.70 | 3.25 | 5.05 | 8.3 | 2625 | 23471 | 83.1 | | 8.55 | 3.40 | 5.3 | 8.7 | 1562 | 20125 | 83.9 | 323 | 0.00 | | 1.3 | 1.3 | | 541000 | | | 1.14 | | 2.3 | 2.3 | | 33540 | 43.5 | | 2.85 | | 3.5 | 3.5 | | 24500 | 62.9 | | 5.70 | 1.44 | 4.16 | 5.6 | 2966 | 20760 | 76.8 | | 8.55 | 2.20 | 4.90 | 7.1 | 1695 | 15600 | 81.7 |
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