银纳米颗粒对铝金属在酸性介质中的耐蚀性能研究

doi:10.13208/j.electrochem.160427

电化学（中英文） ›› 2018, Vol. 24 ›› Issue (1): 89-100. doi: 10.13208/j.electrochem.160427

• 电镀与表面精饰近期研究专辑( 哈尔滨工业大学安茂忠教授主编) • 上一篇下一篇

银纳米颗粒对铝金属在酸性介质中的耐蚀性能研究

H. A. Fetouh^1*, B.A. Abd-El-Nabey¹, Y.M. Goher², M. S. Karam¹

1. 埃及亚历山大大学理学院化学系，易卜拉欣，亚历山大 21321，埃及；
2. 埃及亚历山大大学理学院生物系，易卜拉欣，亚历山大 21321，埃及

收稿日期:2016-04-27 修回日期:2017-01-03 出版日期:2018-02-28 发布日期:2017-01-04
通讯作者: H.A.Fetouh E-mail:howida_fetouh @yahoo.com
基金资助:
This work was supported by Faculty of Science, Alexandria University

An Electrochemical Investigation in the Anticorrosive Properties of Silver Nanoparticles for the Acidic Corrosion of Aluminium

H. A. Fetouh^1*, B.A. Abd-El-Nabey¹, Y.M. Goher², M. S. Karam¹

1. Department of Chemistry, Faculty of Science, Alexandria University, Ibrahimia, P.O. Box 426, Alexandria 21321, EGYPT; 2. Department of Botany, Faculty of Science, Alexandria University, Ibrahimia, P.O. Box 426, Alexandria 21321, EGYPT

Received:2016-04-27 Revised:2017-01-03 Published:2018-02-28 Online:2017-01-04
Contact: H.A.Fetouh E-mail:howida_fetouh @yahoo.com
Supported by:
This work was supported by Faculty of Science, Alexandria University

摘要/Abstract

摘要： 采用材料失重、动电位极化和电化学交流阻抗技术，分别测试了温度为30 ℃，浓度为1.0 mol·L^-1盐酸溶液中不添加和添加银纳米颗粒时铝的腐蚀速率. 结果表明，当银纳米颗粒的浓度为0.014 g·L^-1时，其防护效率达96.4%. 随着银纳米颗粒的浓度增大，铝/溶液界面的双电层电容值减小，说明铝的表面发生了银纳米颗粒的吸附. 朗缪尔吸附等温方程和动力学-热力学模型均可以较好地拟合所得到的实验数据. 为了确认铝金属表面与银纳米颗粒的相互作用类型，得到了铝的零电荷电位值. 研究发现，通过扫描电子显微镜和能量散射X-射线能谱分析，并结合电化学实验后铝电极表面的外观观察，可以很好地解释材料失重和电化学测试得到的数据.

关键词: 铝, 银纳米颗粒, 腐蚀速率, 电化学技术

Abstract:

The mass loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques were used for the determinations of the corrosion rates for aluminium in 1.0 mol·L^-1 hydrochloric acid (HCl) solutions both in the absence and presence of silver nanoparticles (SNPs) at 30 ℃. The protection efficiency was evaluated to be 96.4% for 0.014 g·L^-1 of the SNPs. It has been found that the capacity of the electrical double layer at the aluminium/solution interface was decreased with increasing the concentration of the SNPs, indicating that the SNPs were adsorbed at the aluminium surface. The Langmuir adsorption isotherm and the kinetic-thermodynamic model were fitted to the experimental data. The potential of zero charge (PZC) for aluminium was determined in order to clarify the type of interaction between the metal surface and the SNPs. The experimental data obtained by scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX) spectroscopy, together with the visual inspections at the surfaces of the aluminium electrodes after the electrochemical tests, all gave very good support to those obtained by the mass loss and electrochemical measurements.

Key words: aluminium, silver nanoparticles, corrosion rate, electrochemical technique

中图分类号:

O646

H. A. Fetouh, B.A. Abd-El-Nabey, Y.M. Goher, M. S. Karam. 银纳米颗粒对铝金属在酸性介质中的耐蚀性能研究[J]. 电化学（中英文）, 2018, 24(1): 89-100.

H. A. Fetouh, B.A. Abd-El-Nabey, Y.M. Goher, M. S. Karam. An Electrochemical Investigation in the Anticorrosive Properties of Silver Nanoparticles for the Acidic Corrosion of Aluminium[J]. Journal of Electrochemistry, 2018, 24(1): 89-100.

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https://electrochem.xmu.edu.cn/CN/Y2018/V24/I1/89

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银纳米颗粒对铝金属在酸性介质中的耐蚀性能研究

An Electrochemical Investigation in the Anticorrosive Properties of Silver Nanoparticles for the Acidic Corrosion of Aluminium

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