Corrosion inhibition effect of sodium silicate/triethanolamine complex inhibitor on AZ91D magnesium alloy in 50% ethylene glycol coolant

IF 2.6 4区化学 Q3 ELECTROCHEMISTRY

Journal of Solid State Electrochemistry Pub Date : 2024-10-17 DOI:10.1007/s10008-024-06104-0

Jintai Pan, Junchao Huang, Fuli Deng, Dong Liu

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引用次数: 0

Abstract

Ethylene glycol solutions can cause severe corrosion in magnesium alloys, leading to safety and stability concerns. The addition of corrosion inhibitors to the environment is a simple and effective protective measure. This study introduces a compound corrosion inhibitor that combines inorganic and organic components, providing resistance to salts, high temperatures, and environmental factors. The corrosion inhibition of AZ91D magnesium alloy using a sodium silicate/triethanolamine compound inhibitor in 50% glycol coolant was investigated through electrochemical analysis, morphology characterization, and weight loss analysis. The results demonstrated that the sodium silicate/triethanolamine inhibitor effectively prevented corrosion of AZ91D magnesium alloy in 50% ethylene glycol, achieving a maximum inhibition efficiency of 96.4% with 2 g/L sodium silicate and 3 mL/L triethanolamine. The inhibitor exhibited continued effectiveness at elevated temperatures and showed minimal impact from external ions, providing strong protection for AZ91D magnesium alloy in glycol coolant. The outstanding performance can be attributed to the synergistic interaction of triethanolamine and sodium silicate, which form a protective film on the alloy’s surface. This compound inhibitor exhibits promising potential for safeguarding AZ91D magnesium alloy in similar environments. Furthermore, the proposed mechanism elucidates how the sodium silicate/triethanolamine mixture mitigates galvanic corrosion in the AZ91D magnesium alloy.

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水玻璃/三乙醇胺络合缓蚀剂在50%乙二醇冷却剂中对AZ91D镁合金的缓蚀作用

乙二醇溶液会对镁合金造成严重腐蚀，导致安全性和稳定性问题。在环境中添加缓蚀剂是一种简单有效的防护措施。本研究介绍了一种复合缓蚀剂，它结合了无机和有机成分，具有耐盐、耐高温和耐环境因素的能力。通过电化学分析、形貌表征和失重分析，研究了水玻璃/三乙醇胺复合缓蚀剂对AZ91D镁合金在50%乙二醇冷却液中的缓蚀作用。结果表明，水玻璃/三乙醇胺缓蚀剂能有效防止AZ91D镁合金在50%乙二醇溶液中的腐蚀，当水玻璃浓度为2 g/L、三乙醇胺浓度为3 mL/L时，缓蚀率最高达96.4%。该抑制剂在高温下表现出持续的有效性，并且受到外部离子的影响最小，为乙二醇冷却剂中的AZ91D镁合金提供了强有力的保护。优异的性能可归因于三乙醇胺和硅酸钠的协同作用，它们在合金表面形成保护膜。该复合抑制剂在类似环境下对AZ91D镁合金具有良好的保护作用。此外，所提出的机理阐明了水玻璃/三乙醇胺混合物如何减轻AZ91D镁合金中的电偶腐蚀。

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

Journal of Solid State Electrochemistry 工程技术-电化学

CiteScore

4.80

自引率

4.00%

发文量

227

审稿时长

4.1 months

期刊介绍： The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry. The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces. The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis. The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.