Research Article
Corrosion and Inhibition Effects of Mild Steel in Hydrochloric Acid Solutions Containing Organophosphonic Acid
Table 1
Results of planned interval test (PIT) on mild steel in 10% HCl solution.
|
S. no. |
Period | Without inhibitor | With inhibitor |
% inhibition | Concentration (milligram 102) | Corrosion rate (milligram centimeter−2 hour−1 102) | Concentration (milligram 102) | Corrosion rate (milligram centimeter−2 hour−1 102) |
| 1 | (3 h) | 18.96 | 21.2 | 5.21 | 5.82 | 72 | 2 | (22 h) | 31.05 | 4.70 | 6.32 | 0.96 | 79 | 3 | (22 + 3 h) | 34.58 | 4.64 | 6.40 | 0.85 | 82 | 4 | (3 h) | 3.33 | 3.72 | 0.50 | 0.50 | 96 | 5 | (3 h) | 3.53 | 3.94 | 0.08 | 0.08 | 97 |
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