A novel corrosion inhibitor based on a Schiff base for mild steel in 1M HCl: synthesis and anticorrosion study

IF 2.3 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Anti-corrosion Methods and Materials Pub Date : 2024-01-23 DOI:10.1108/acmm-08-2023-2878

Evrim Baran Aydın, Eyüp Başaran, Sevgi Ateş, Reşit Çakmak

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引用次数: 0

Abstract

Purpose

The aim of this study was to investigate the activity of 4-((4-((2-hydroxyethyl)(methyl)amino)benzylidene) amino)-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one (HEMAP), a Schiff base synthesized and characterized for the first time, to the authors’ knowledge, as a novel inhibitor against corrosion of mild steel (MS) in hydrochloric acid solution.

Design/methodology/approach

HEMAP was characterized by some spectroscopic methods including High-Resolution Mass Spectrometry (HRMS), Proton Nuclear Magnetic Resonance (1H NMR), Carbon-13 (C13) nuclear magnetic resonance (13C NMR) and Fourier Transform Infrared Spectroscopy (FT-IR). Then, the inhibition efficiency of HEMAP on MS in a hydrochloric acid solution was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). To explain the inhibition mechanism, the surface charge, adsorption isotherms and thermodynamic parameters of MS in the inhibitor solution were studied.

Findings

EIS tests displayed that the highest inhibition efficiency was calculated approximately as 99.5% for 5 × 10⁻² M HEMAP in 1 M HCl solution. The adsorption of HEMAP on the MS surface was found to be compatible with the Langmuir model isotherm. The thermodynamic parameter results showed that the standard free energy of adsorption of HEMAP on the MS surface was found to be more chemical than physical.

Originality/value

This study is important in terms of demonstrating the performance of the first synthesized HEMAP molecule as an inhibitor against the corrosion of MS in acidic media. EIS tests displayed that the highest inhibition efficiency was calculated approximately as 99.5% for 5 × 10⁻² M HEMAP in 1 M HCl solution.

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一种基于希夫碱的新型缓蚀剂：在 1M HCl 溶液中用于低碳钢的合成与防腐研究

目的本研究旨在探讨 4-((4-((2-羟乙基)(甲基)氨基)亚苄基)氨基)-1,5-二甲基-2-苯基-1,2-二氢-3H-吡唑-3-酮（HEMAP）的活性，据作者所知，这是首次合成并表征的一种席夫碱，可作为盐酸溶液中低碳钢（MS）的新型缓蚀剂。设计/方法/途径通过高分辨质谱法（HRMS）、质子核磁共振法（1H NMR）、碳-13（C13）核磁共振法（13C NMR）和傅立叶变换红外光谱法（FT-IR）等光谱方法对 HEMAP 进行了表征。然后，通过电位极化和电化学阻抗谱（EIS）研究了盐酸溶液中 HEMAP 对 MS 的抑制效率。EIS 试验结果表明，在 1 M 盐酸溶液中，5 × 10-2 M HEMAP 的最高抑制效率约为 99.5%。发现 HEMAP 在 MS 表面的吸附符合 Langmuir 模型等温线。热力学参数结果表明，HEMAP 在 MS 表面的标准吸附自由能的化学性质大于物理性质。EIS 测试表明，5 × 10-2 M HEMAP 在 1 M HCl 溶液中的最高抑制效率约为 99.5%。

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来源期刊

Anti-corrosion Methods and Materials 工程技术-冶金工程

CiteScore

2.80

自引率

16.70%

发文量

审稿时长

13.5 months

期刊介绍： Anti-Corrosion Methods and Materials publishes a broad coverage of the materials and techniques employed in corrosion prevention. Coverage is essentially of a practical nature and designed to be of material benefit to those working in the field. Proven applications are covered together with company news and new product information. Anti-Corrosion Methods and Materials now also includes research articles that reflect the most interesting and strategically important research and development activities from around the world. Every year, industry pays a massive and rising cost for its corrosion problems. Research and development into new materials, processes and initiatives to combat this loss is increasing, and new findings are constantly coming to light which can help to beat corrosion problems throughout industry. This journal uniquely focuses on these exciting developments to make essential reading for anyone aiming to regain profits lost through corrosion difficulties. • New methods, materials and software • New developments in research and industry • Stainless steels • Protection of structural steelwork • Industry update, conference news, dates and events • Environmental issues • Health & safety, including EC regulations • Corrosion monitoring and plant health assessment • The latest equipment and processes • Corrosion cost and corrosion risk management.