Synthesis, Electrochemical, Thermodynamic, and Quantum Chemical Investigations of Amino Cadalene as a Corrosion Inhibitor for Stainless Steel Type 321 in Sulfuric Acid 1M

IF 2.3 Q3 ELECTROCHEMISTRY International journal of electrochemistry Pub Date : 2020-08-26 DOI:10.1155/2020/5620530
Y. Koumya, R. Idouhli, A. Oukhrib, M. Khadiri, A. Abouelfida, A. Benyaich
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引用次数: 17

Abstract

The corrosion of stainless steel is one of the major industries’ issues that gained wide interest among researchers. It became necessary to develop and apply eco-friendly approaches to corrosion control. This work explores the inhibitory effect of a newly synthesized amino cadalene (ACM) on the corrosion of stainless steel type 321 in sulfuric acid 1M. Particularly, the experimental study consisting of electrochemical and surface analyses was conducted in conjunction with a theoretical approach. The electrochemical results showed that ACM acted as a mixed-type corrosion inhibitor and the inhibition efficiency attained 91% at 10−3M. EIS measurements revealed that both metal charge transfer and diffusion processes are involved in the interfacial metal/solution reactions. The interfacial mechanism is thoroughly investigated; the physisorption of the protonated molecules was preceded by the formation of a negative layer due to adsorption of the solution anionic species. The experimental insights are corroborated with the quantum chemical calculations.
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321不锈钢在1M硫酸中缓蚀剂氨基Cadalene的合成、电化学、热力学和量子化学研究
不锈钢的腐蚀问题是目前国内外研究人员广泛关注的主要工业问题之一。因此,有必要开发和应用生态友好的腐蚀控制方法。本文研究了新合成的氨基二邻苯二烯(ACM)对321型不锈钢在1M硫酸中的腐蚀抑制作用。特别地,实验研究包括电化学和表面分析与理论方法相结合。电化学结果表明,ACM作为混合型缓蚀剂,在10−3M时的缓蚀效率达到91%。EIS测量结果表明,金属电荷转移和扩散过程都参与了金属/溶液界面反应。深入研究了界面机理;质子化分子的物理吸附之前,由于溶液中阴离子的吸附,形成了一个负层。实验结果与量子化学计算结果相吻合。
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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