Research Article
Corrosion Inhibition and Adsorption Properties of Ethanolic Extract of Calotropis for Corrosion of Aluminium in Acidic Media
Table 6
Thermometric reaction for aluminium in 4 N and 5 N sulphuric acid with ethanolic extract of leaves, latex, and fruit of Ccalotropis procera.
| Inhibitor concentration | Reaction number (RN) 4 N | Inhibition efficiency (%) | Reaction number (RN) 5 N | Inhibition efficiency (%) |
| Uninhibited | 2.48 | | 3.10 | | Leaves | | | | | 0.12 | 1.58 | 36.36 | 2.27 | 26.83 | 0.24 | 1.55 | 37.37 | 2.05 | 33.86 | 0.36 | 1.50 | 39.38 | 1.92 | 38.11 | 0.48 | 1.02 | 58.61 | 1.60 | 48.32 | 0.60 | 0.89 | 63.87 | 1.20 | 61.15 | Latex | | | | | 0.12 | 1.46 | 41.19 | 2.42 | 21.84 | 0.24 | 1.40 | 43.64 | 2.11 | 31.89 | 0.36 | 1.26 | 49.12 | 2.08 | 32.89 | 0.48 | 1.12 | 54.87 | 1.84 | 40.56 | 0.60 | 0.94 | 61.83 | 1.48 | 52.19 | Fruit | | | | | 0.12 | 1.44 | 41.95 | 2.09 | 32.57 | 0.24 | 1.32 | 44.01 | 1.94 | 37.31 | 0.36 | 1.22 | 50.80 | 1.87 | 39.47 | 0.48 | 1.01 | 59.17 | 1.53 | 50.48 | 0.60 | 0.81 | 67.33 | 1.18 | 61.95 |
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