Stem Extract of Brahmi (Bacopa monnieri) as Green Corrosion Inhibitor for Aluminum in NaOH Solution

被引：0

作者：

Singh, Ambrish ^{[1
]}

Ebenso, Eno E. ^{[2
]}

Quraishi, M. A. ^{[1
]}

机构：

[1] Banaras Hindu Univ, Inst Technol, Dept Appl Chem, Varanasi 221005, Uttar Pradesh, India

[2] North West Univ, Dept Chem, Sch Math & Phys Sci, ZA-2735 Mmabatho, South Africa

来源：

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2012年 / 7卷 / 04期

关键词：

Aluminium; Corrosion inhibition; Plant extract; Alkaline solution; Weight loss method; MILD-STEEL; HYDROCHLORIC-ACID; DISSOLUTION; ALLOYS; AL; TEMPERATURE; METALS;

D O I：

暂无

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The stem extract of Bacopa monnieri was investigated as corrosion inhibitor of aluminium in 0.5 M NaOH solution using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) methods, and weight loss measurements. The results revealed that Bacopa monnieri stem extract was an effective inhibitor, and the inhibition efficiencies obtained from polarization and weight loss experiments were in good agreement. Using the potentiodynamic polarization technique, the extract proved to be a mixed-type inhibitor for aluminium in alkaline solution by suppressing both anodic and cathodic reactions on the metal surface. The Langmuir adsorption isotherm model fitted results obtained from the weight loss. Thermodynamic parameters such as activation energy, free energy of adsorption were calculated.

引用

页码：3409 / 3419

页数：11

共 30 条

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