Enhanced corrosion protection of AZ31B magnesium alloy by MgAl-LDHs composite coatings double-doped with imidazolium ionic liquid and sodium dodecylbenzenesulphonate

IF 1.5 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Engineering, Science and Technology Pub Date : 2023-01-13 DOI:10.1080/1478422X.2023.2165634

Yingxue Liu, Huijie Huangfu, Shuai Gao, Xugeng Guo, Li Wang

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引用次数: 1

Abstract

ABSTRACT Herein, we prepare two types of MgAl-LDHs coatings single-doped by imidazolium ionic liquid 1-decyl-3-methylimidazolium bromide ([Demim]Br) or sodium dodecylbenzenesulphonate (SDBS) and double-doped by [Demim]Br and SDBS on AZ31B Mg alloy by using an in-situ hydrothermal treatment. Their surface morphology and corrosion resistance immersed in 3.5 wt-% NaCl solution are explored. Our results suggest that the double doping of [Demim]Br and SDBS will change the surface morphology of the coating and a uniform and dense film is observed in the double-doped MgAl-LDHs, which is denser than those of the two single-doped MgAl-LDHs coatings, thus providing a superior corrosion resistance. Such an improvement can be ascribed to the synergetic inhibition effect of [Demim]Br and SDBS against the corrosion of the Mg alloy substrate. More importantly, the charge transfer resistance of the sample coated with the double-doped MgAl-LDHs is still high after 3 d of immersion, benefiting from the excellent self-healing effect.

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咪唑离子液体和十二烷基苯磺酸钠双掺杂MgAl-LDHs复合涂层增强AZ31B镁合金的防腐性能

摘要本文采用原位水热处理的方法，在AZ31B镁合金上制备了咪唑离子液体1-癸基-3-甲基咪唑鎓溴化物（[Demim]Br）或十二烷基苯磺酸钠（SDBS）单掺杂和[Demim]Br和SDBS双掺杂的两种MgAl-LDHs涂层。探讨了它们在3.5wt-%NaCl溶液中的表面形态和耐腐蚀性。我们的结果表明，[Demim]Br和SDBS的双重掺杂将改变涂层的表面形态，并且在双重掺杂的MgAl-LDHs中观察到均匀致密的膜，其密度比两种单一掺杂的MgAl-Ldh涂层的密度大，从而提供了优异的耐腐蚀性。这种改善可归因于[Demim]Br和SDBS对镁合金基体腐蚀的协同抑制作用。更重要的是，涂覆有双掺杂MgAl-LDHs的样品在浸泡3d后的电荷转移电阻仍然很高，这得益于其优异的自修复效果。

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

Corrosion Engineering, Science and Technology 工程技术-材料科学：综合

CiteScore

3.20

自引率

5.60%

发文量

审稿时长

3.4 months

期刊介绍： Corrosion Engineering, Science and Technology provides broad international coverage of research and practice in corrosion processes and corrosion control. Peer-reviewed contributions address all aspects of corrosion engineering and corrosion science; there is strong emphasis on effective design and materials selection to combat corrosion and the journal carries failure case studies to further knowledge in these areas.