| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8012420 | Materials Letters | 2018 | 10 Pages |
Abstract
The corrosion inhibitive characteristics of the cashew nut (Anacardium occidentale) were studied as an eco-friendly green corrosion inhibitor at ambient temperature of 25â¯Â°C using weight loss analysis and adsorption isotherms. The effect of inhibitor concentration (4-12â¯g/l) at immersion time of 3-12â¯days was evaluated. The inhibitive ability of cashew nut shows a significant inhibition efficiency of 86% at 12â¯g/l concentration for 3-days and 72.9% at 12-days, which are undoubtedly as a result of the absorption of the inhibitor molecules on the metal surface which serve as a barrier against corrosion of carbon steel in acidic medium. The adsorption mechanism was found to fit Tempkin isotherms. The average optimum free energy of absorption was calculated to be â17.374â¯kJâ¯mol-1 indicating that the process was exothermic and physisorption.
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Authors
Hassan Mohammed, Shafreeza bt. Sobri,