Expired flunarizine hydrochloride as corrosion inhibitors for Q235 steel in hydrochloric acid medium: Experimental and computational investigation

IF 1.6 4区化学 Q4 CHEMISTRY, PHYSICAL Surface and Interface Analysis Pub Date : 2023-06-27 DOI:10.1002/sia.7245

Qiangwen Lin, Qiao Zhang, Yongbiao Huang, Yuzhou Luo, Renhui Zhang, Lei Guo

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Abstract

The corrosion of carbon steel is always a very serious issue, and the addition of corrosion inhibitors is an effective approach to prohibiting the corrosion of carbon steel. Because expired drugs are environmentally friendly, green, and non‐toxic; thus, this work provides a new idea for the treatment of expired drugs. The expired flunarizine hydrochloride (FH) is used as corrosion inhibitors for Q235 steel, investigating the corrosion inhibition efficiency of expired FH with different concentrations for carbon steel and illustrating the corrosion inhibition mechanism. Electrochemical impedance and Tafel curves are used to investigate the corrosion inhibition of carbon steel under 1 M HCl solution with different concentrations of the expired FH, and the corrosion efficiency is calculated according to the immersion tests, and the corrosion inhibition efficiency is more than 88.5%. Scanning electron microscopy (SEM), Fourier transform infrared spectrometer (FTIR), and Raman spectroscopy strongly support the results of the electrochemical experiment. Besides, the simulation results also provide the strong supports for the experimental results.

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过期盐酸氟桂利嗪作为Q235钢在盐酸介质中的缓蚀剂的实验与计算研究

碳钢的腐蚀一直是一个非常严重的问题，添加缓蚀剂是抑制碳钢腐蚀的有效方法。因为过期药品是环保的、绿色的、无毒的；因此，这项工作为过期药品的治疗提供了新的思路。采用过期盐酸氟桂利嗪（FH）作为Q235钢的缓蚀剂，研究了不同浓度过期FH对碳钢的缓蚀效果，阐明了其缓蚀机理。用电化学阻抗和Tafel曲线研究了碳钢在1 M HCl溶液中不同浓度的失效FH，并根据浸泡试验计算腐蚀效率，缓蚀效率超过88.5%。扫描电子显微镜（SEM）、傅立叶变换红外光谱仪（FTIR）和拉曼光谱有力地支持了电化学实验的结果。仿真结果也为实验结果提供了有力的支持。

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

Surface and Interface Analysis 化学-物理化学

CiteScore

3.30

自引率

5.90%

发文量

130

审稿时长

4.4 months

期刊介绍： Surface and Interface Analysis is devoted to the publication of papers dealing with the development and application of techniques for the characterization of surfaces, interfaces and thin films. Papers dealing with standardization and quantification are particularly welcome, and also those which deal with the application of these techniques to industrial problems. Papers dealing with the purely theoretical aspects of the technique will also be considered. Review articles will be published; prior consultation with one of the Editors is advised in these cases. Papers must clearly be of scientific value in the field and will be submitted to two independent referees. Contributions must be in English and must not have been published elsewhere, and authors must agree not to communicate the same material for publication to any other journal. Authors are invited to submit their papers for publication to John Watts (UK only), Jose Sanz (Rest of Europe), John T. Grant (all non-European countries, except Japan) or R. Shimizu (Japan only).