| Kopsia Singapurensis提取物对酸性介质中低碳钢的缓蚀效应(英文) |
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| 作者姓名： | RAJA Pandian Bothi RAHIM Afidah Abdul OSMAN Hasnah AWANG Khalijah |
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| 作者单位： | School of Chemical Sciences, University Sains Malaysia, 11800 Penang, Malaysia; Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia |
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| 基金项目： | The project was supported by the USM Research Fund, Malaysia (RU-1001/229/PKIMIA/811006, FRGS-203/PKMIA/671030). |
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| 摘 要： | The influence of the alkaloid extract of Kopsia singapurensis on the corrosion behavior of mild steel (MS) in 1 mol·L-1 HCl and 1 mol·L-1 H2SO4 was studied using electrochemical techniques, viz., potentiodynamic polarization and AC impedance. The experimental results clearly show that the plant extract effectively inhibits corrosion in both acid media and the inhibition efficiency obtained from the electrochemical techniques is in good agreement. Furthermore, the polarization technique indicates that the extract acts as an anodic type inhibitor in HCl and as a mixed type in H2SO4. Scanning electron microscopy (SEM) was carried out to examine the surface morphological changes of metal specimens in both the inhibited and uninhibited solutions. SEM images show the formation of an adsorbed layer over the metal surface by the inhibitor molecule. The presence of alkaloidal constituents in the plant extract was confirmed by Fourier transform infrared (FTIR) spectroscopy and chemical analysis.
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| 收稿时间： | 2010-01-14 |
| 修稿时间： | 2010-05-17 |
Inhibitory Effect of Kopsia Singapurensis Extract on the Corrosion Behavior of Mild Steel in Acid Media |
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| RAJA Pandian Bothi,RAHIM Afidah Abdul,OSMAN Hasnah,AWANG Khalijah.Inhibitory Effect of Kopsia Singapurensis Extract on the Corrosion Behavior of Mild Steel in Acid Media[J].Acta Physico-Chimica Sinica,2010,26(8):2171-2176. |
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| Authors: | RAJA Pandian Bothi RAHIM Afidah Abdul OSMAN Hasnah AWANG Khalijah |
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| Institution: | School of Chemical Sciences, University Sains Malaysia, 11800 Penang, Malaysia; Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia |
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| Abstract: | The influence of the alkaloid extract of Kopsia singapurensis on the corrosion behavior of mild steel (MS) in 1 mol·L-1 HC1 and 1 mol·L-1 H2SO4 was studied using electrochemical techniques，viz.，potentiodynamic polarization and AC impedance.The experimental results clearly show that the plant extract effectively inhibits corrosion in both acid media and the inhibition efficiency obtained from the electrochemical techniques is in good agreement.Furthermore，the polarization technique indicates that the extract acts as an anodic type inhibitor in HC1 and
as a mixed type in H2SO4 Scanning election microscopy (SEM) was carried out to examine the surface morphological changes of metal specimens in both the inhibited and uninhibited solutions.SEM images show the formation of an adsorbed layer over the metal surface by the inhibitor molecule.The presence of alkaloidal constituents in the plant extract was confirmed by Fourier transform infrared (FTIR) spectroscopy and chemical analysis. |
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| Keywords: | Corrosion inhibitor Kopsia singapurensis Mild steel Polarization Impedance SEM FTIR |
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