Research Article
Effect of Caffeine-Zn2+ System in Preventing Corrosion of Carbon Steel in Well Water
Table 5
Influence of duration of immersion on IE of caffeine (200 ppm)-Zn2+ (50 ppm), malic acid (25 ppm).
| System | Immersion period (days) | CR (mdd) |
IE (%) | Presence of inhibitor | Absence of inhibitor |
| Caffeine (200 ppm)-Zn2+ (50 ppm), malic acid (25 ppm). | 1 | 1.02 | 20.40 | 95 | 3 | 2.47 | 22.42 | 89 | 5 | 49.62 | 68.92 | 28 | 7 | 75.50 | 93.21 | 19 |
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