The inhibitor effect of migrating corrosion inhibitors on Q235 steel in high alkaline environment under cathodic polarization

IF 2.3 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Anti-corrosion Methods and Materials Pub Date : 2024-04-25 DOI:10.1108/acmm-02-2024-2972

Hang Jia, Zhiming Gao, Shixiong Wu, Jia Liang Liu, Wenbin Hu

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Abstract

Purpose This study aims to investigate the corrosion inhibitor effect of migrating corrosion inhibitor (MCI) on Q235 steel in high alkaline environment under cathodic polarization. Design/methodology/approach This study investigated the electrochemical characteristics of Q235 steel with and without MCI by polarization curve and electrochemical impedance spectroscopy. Besides, the surface composition of Q235 steel under different environments was analyzed by X-ray photoelectron spectroscopy. In addition, the migration characteristic of MCI and the adsorption behavior of MCI under cathodic polarization were studied using Raman spectroscopy. Findings Diethanolamine (DEA) and N, N-dimethylethanolamine (DMEA) can inhibit the increase of Fe(II) in the oxide film of Q235 steel under cathodic polarization. The adsorption stability of DMEA film was higher under cathodic polarization potential, showing a higher corrosion inhibition ability. The corrosion inhibition mechanism of DEA and DMEA under cathodic polarization potential was proposed. Originality/value The MCI has a broad application prospect in the repair of damaged reinforced concrete due to its unique migratory characteristics. The interaction between MCIs, rebar and concrete with different compositions has been studied, but the passivation behavior of the steel interface in the presence of both the migrating electric field and corrosion inhibitors has been neglected. And it was investigated in this paper.

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阴极极化下高碱性环境中迁移腐蚀抑制剂对 Q235 钢的抑制效果

目的本研究旨在探讨迁移缓蚀剂（MCI）在阴极极化条件下对高碱性环境中的 Q235 钢的缓蚀效果。此外，还利用 X 射线光电子能谱分析了 Q235 钢在不同环境下的表面成分。研究结果二乙醇胺（DEA）和 N，N-二甲基乙醇胺（DMEA）在阴极极化条件下能抑制 Q235 钢氧化膜中铁（II）的增加。在阴极极化电位下，DMEA 膜的吸附稳定性更高，显示出更强的缓蚀能力。提出了 DEA 和 DMEA 在阴极极化电位下的缓蚀机理。不同成分的 MCIs、钢筋和混凝土之间的相互作用已被研究，但钢筋界面在迁移电场和缓蚀剂作用下的钝化行为却被忽视。本文对此进行了研究。

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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.