The Effects of Cassia Siamea Lam. Root Extract on the Corrosion and Kinetics of Corrosion Process of Copper in Alkaline Solutions
The effect of Cassia siamea lam. (CSL) root extract as a corrosion inhibitor of copper in 0.50 M NaOH solutions was investigated using absorbance difference technique at 30 °C and 40 °C. CSL root extract inhibited the corrosion of copper in 0.50 M NaOH solutions and the inhibition efficiency (% IE)...
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| Format: | Article |
| Language: | English |
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Wiley
2011-01-01
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| Series: | E-Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2011/372903 |
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| author | A. I Onen B. T. Nwufo E. E. Ebenso |
| author_facet | A. I Onen B. T. Nwufo E. E. Ebenso |
| author_sort | A. I Onen |
| collection | DOAJ |
| description | The effect of Cassia siamea lam. (CSL) root extract as a corrosion inhibitor of copper in 0.50 M NaOH solutions was investigated using absorbance difference technique at 30 °C and 40 °C. CSL root extract inhibited the corrosion of copper in 0.50 M NaOH solutions and the inhibition efficiency (% IE) increased to a maximum of 78.3±2.3% with increasing concentration of the extract but decreased with increasing temperature. The adsorption of CSL root extract on copper surface followed the Langmuir adsorption model with the average heat of adsorption, Qads and free energy of adsorption, ΔGads of -8.98 kJmol-1 and -8.70 kJmol-1 respectively. A kinetic treatment of the data revealed a first order kinetics with respect to copper in the presence and absence of the extract. |
| format | Article |
| id | doaj-art-7d35bd46bef94724898cc0882d8b3986 |
| institution | Kabale University |
| issn | 0973-4945 2090-9810 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
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| series | E-Journal of Chemistry |
| spelling | doaj-art-7d35bd46bef94724898cc0882d8b39862025-02-03T01:21:57ZengWileyE-Journal of Chemistry0973-49452090-98102011-01-01841708171310.1155/2011/372903The Effects of Cassia Siamea Lam. Root Extract on the Corrosion and Kinetics of Corrosion Process of Copper in Alkaline SolutionsA. I Onen0B. T. Nwufo1E. E. Ebenso2Department of Chemistry, Adamawa State University, P.M.B-25, Mubi, NigeriaDepartment of Chemistry, University of Jos, Plateau State, NigeriaDepartment of Chemistry, North West University (Mafikeng Campus), Private Bag X2046, Mmabatho-2735, South AfricaThe effect of Cassia siamea lam. (CSL) root extract as a corrosion inhibitor of copper in 0.50 M NaOH solutions was investigated using absorbance difference technique at 30 °C and 40 °C. CSL root extract inhibited the corrosion of copper in 0.50 M NaOH solutions and the inhibition efficiency (% IE) increased to a maximum of 78.3±2.3% with increasing concentration of the extract but decreased with increasing temperature. The adsorption of CSL root extract on copper surface followed the Langmuir adsorption model with the average heat of adsorption, Qads and free energy of adsorption, ΔGads of -8.98 kJmol-1 and -8.70 kJmol-1 respectively. A kinetic treatment of the data revealed a first order kinetics with respect to copper in the presence and absence of the extract.http://dx.doi.org/10.1155/2011/372903 |
| spellingShingle | A. I Onen B. T. Nwufo E. E. Ebenso The Effects of Cassia Siamea Lam. Root Extract on the Corrosion and Kinetics of Corrosion Process of Copper in Alkaline Solutions E-Journal of Chemistry |
| title | The Effects of Cassia Siamea Lam. Root Extract on the Corrosion and Kinetics of Corrosion Process of Copper in Alkaline Solutions |
| title_full | The Effects of Cassia Siamea Lam. Root Extract on the Corrosion and Kinetics of Corrosion Process of Copper in Alkaline Solutions |
| title_fullStr | The Effects of Cassia Siamea Lam. Root Extract on the Corrosion and Kinetics of Corrosion Process of Copper in Alkaline Solutions |
| title_full_unstemmed | The Effects of Cassia Siamea Lam. Root Extract on the Corrosion and Kinetics of Corrosion Process of Copper in Alkaline Solutions |
| title_short | The Effects of Cassia Siamea Lam. Root Extract on the Corrosion and Kinetics of Corrosion Process of Copper in Alkaline Solutions |
| title_sort | effects of cassia siamea lam root extract on the corrosion and kinetics of corrosion process of copper in alkaline solutions |
| url | http://dx.doi.org/10.1155/2011/372903 |
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