Research Article
Synergistic Effect of KI on Corrosion Inhibition of Mild Steel by Polynuclear Schiff Base in Sulphuric Acid
Table 1
Calculated values of inhibition efficiency (
%) for MS corrosion in 0.5 M H
2SO
4 for different systems at 30°C from weight loss measurements.
| Systems/concentrations | Corrosion rate (mm/y) | Inhibition efficiency ( %) | |
| Blank | 24.01 | — | — | Blank + 0.2 mM KI | 19.40 | 19.16 | 0.19 | 0.2 mM A9O3AP | 18.06 | 24.77 | 0.25 | 0.4 mM A9O3AP | 17.19 | 28.38 | 0.28 | 0.6 mM A9O3AP | 15.96 | 33.54 | 0.34 | 0.8 mM A9O3AP | 14.58 | 39.25 | 0.39 | 1.0 mM A9O3AP | 13.50 | 43.75 | 0.44 | 0.2 mM A9O3AP + 0.2 mM KI | 10.88 | 54.67 | 0.55 | 0.4 mM A9O3AP + 0.2 mM KI | 10.22 | 57.41 | 0.57 | 0.6 mM A9O3AP + 0.2 mM KI | 9.08 | 62.16 | 0.62 | 0.8 mM A9O3AP + 0.2 mM KI | 6.84 | 71.49 | 0.71 | 1.0 mM A9O3AP + 0.2 mM KI | 5.58 | 76.75 | 0.77 |
|
|