Research Article
Corrosion Inhibition and Adsorption Properties of Ethanolic Extract of Calotropis for Corrosion of Aluminium in Acidic Media
Table 7
Thermometric reaction for aluminium in 2 N and 3 N sulphuric acid with ethanolic extract of leaves, latex, and fruit of Calotropis gigantea.
| Inhibitor concentration | Reaction number (RN) 2 N | Inhibition efficiency (%) | Reaction number (RN) 3 N | Inhibition efficiency (%) |
| Uninhibited | 1.26 | | 1.91 | | Leaves | | | | | 0.12 | 0.82 | 34.75 | 1.28 | 33.94 | 0.24 | 0.76 | 39.21 | 1.19 | 38.43 | 0.36 | 0.69 | 45.27 | 1.14 | 40.31 | 0.48 | 0.52 | 58.53 | 0.81 | 59.23 | 0.60 | 0.39 | 68.53 | 0.67 | 64.60 | Latex | | | | | 0.12 | 0.82 | 35.19 | 1.27 | 35.24 | 0.24 | 0.77 | 38.94 | 1.15 | 39.47 | 0.36 | 0.72 | 44.32 | 0.94 | 53.08 | 0.48 | 0.54 | 57.25 | 0.83 | 57.73 | 0.60 | 0.40 | 68.53 | 0.72 | 62.66 | Fruit | | | | | 0.12 | 0.79 | 38.89 | 1.37 | 28.83 | 0.24 | 0.70 | 44.60 | 1.31 | 32.37 | 0.36 | 0.64 | 49.01 | 1.10 | 42.37 | 0.48 | 0.47 | 62.56 | 0.78 | 60.63 | 0.60 | 0.35 | 73.58 | 0.58 | 68.56 |
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