Inhibitive action of ethanol extracts from Nauclea latifolia on the corrosion of mild steel in H2SO4 solutions and their adsorption characteristics
| Autor: | Peter C. Okafor, V. E. Ebiekpe, I.E. Uwah |
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| Rok vydání: | 2013 |
| Předmět: |
Nauclea
Chemistry(all) biology Chemistry General Chemical Engineering Metallurgy General Chemistry Corrosion inhibition biology.organism_classification Corrosion Mild steel Metal Ethanol extracts Adsorption Phytochemical visual_art Acid corrosion Chemical Engineering(all) visual_art.visual_art_medium Nauclea latifolia Bark Nuclear chemistry |
| Zdroj: | Arabian Journal of Chemistry. 6:285-293 |
| ISSN: | 1878-5352 |
| DOI: | 10.1016/j.arabjc.2010.10.008 |
| Popis: | The inhibitive action of ethanol extracts from leaves (LV), bark (BK) and roots (RT) of Nauclea latifolia on mild steel corrosion in H 2 SO 4 solutions at 30–60 °C was studied using weight loss and gasometric techniques. The extracts were found to inhibit the corrosion of mild steel in H 2 SO 4 solutions and the inhibition efficiencies of the extracts follow the trend: RT > LV > BK. The inhibition efficiency increased with the extracts concentration but decreased with temperature rise. Physical adsorption of the phytochemical components of the plant on the metal surface is proposed as the mechanism of inhibition. The adsorption characteristics of the inhibitor were approximated by the thermodynamic-kinetic model of El-Awady et al. |
| Databáze: | OpenAIRE |
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