Corrosion Mitigation by an Eco-Friendly Inhibitor: Nerium Oleander Leaf Extract on Carbon Steel in an Acidic Medium

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2020-01-01 DOI:10.4152/pea.202006387

J. A. Selvi, M. Arthanareeswari, P. Kamaraj, T. Malini, V. Elumalai, S. Revathi, N. Subasree

引用次数: 0

Abstract

The inhibitory activity of ethanol extract of Nerium oleander leaf (NOLE) on carbon steel corrosion in 0.5 M and 1.0 M of hydrochloric acid solutions was studied by weight loss method and electrochemical techniques. The inh ibition efficiency (ηw) increased with an increase in the concentration of NOLE and i n temperature. Polarisation curves indicated that NOLE acts as a mixed type of inhibit or. The changes in charge transfer resistance (Rt) with increasing inhibitor (i.e. NOLE) concentrati on assured the adsorption of the inhibitor onto the metal surface. The results of ηw, ηp (inhibition efficiency obtained from polarisation study) and ηR (inhibition efficiency obtained from impedance analysis) are in par with each other. Sur face morphology study uncovered the coating of the inhibitor molecule on the metal surface. The phenomenon of physical adsorption has been established based on the inhibi t on efficiency of the inhibitor with change in temperature.

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一种环保缓蚀剂:夹竹桃叶提取物在酸性介质中对碳钢的缓蚀作用

采用失重法和电化学技术研究了夹竹桃叶乙醇提取物(NOLE)在0.5 M和1.0 M盐酸溶液中对碳钢的腐蚀抑制作用。抑制效率ηw随NOLE浓度的增加和温度的升高而增大。极化曲线表明，NOLE是一种混合型的抑制剂。随着抑制剂(即NOLE)浓度的增加，电荷转移电阻(Rt)的变化保证了抑制剂在金属表面的吸附。ηw、ηp(极化分析得到的抑制效率)和ηR(阻抗分析得到的抑制效率)的结果是一致的。表面形貌研究揭示了抑制剂分子在金属表面的涂层。基于温度变化对缓蚀剂效率的抑制作用，建立了物理吸附现象。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.