Construction of dual-ion co-doped LDH coatings on magnesium alloys for marine applications: Achieving self-healing and anti-biocorrosion properties

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-04-27 DOI:10.1016/j.corsci.2025.112984

Junjie Xie , Bo Li , Dekuan Wang , Xiaoqi Liu , Lele Zhang , Yong Han

引用次数: 0

Abstract

A corrosion-resistant coating for Mg alloys applied in marine environments is developed, integrating self-healing and antibacterial functions. It comprises an inner microporous MgO layer and an outer layer of layered-double-hydroxides (LDH) co-doped with MoO₄²⁻ and deprotonated 2-mercaptobenzothiazolium (MBT⁻), forming Mo-S bonds. This dual-ion doping strategy enhances corrosion resistance by accelerating ion release, promoting self-healing through weakened bonding between the doped ions and LDH octahedra due to the formed Mo-S bonds. Released MBT⁻ also provides high antibacterial rate against Staphylococcus aureus (93.76 %) and mitigate biocorrosion. This approach offers an effective strategy for a protective coating construction on Mg in marine applications.

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船用镁合金双离子共掺杂LDH涂层的构建：实现自修复和抗生物腐蚀性能

研制了一种集自愈和抗菌功能于一体的海洋镁合金耐腐蚀涂层。它包括一个内部的微孔MgO层和一个外层的层状双氢氧化物（LDH），与MoO4²⁻和去质子化的2-巯基苯并噻唑（MBT）共掺杂，形成Mo-S键。这种双离子掺杂策略通过加速离子释放来增强抗腐蚀能力，由于形成了Mo-S键，掺杂离子与LDH八面体之间的键被削弱，从而促进了自愈。释放的MBT对金黄色葡萄球菌也有很高的抗菌率（93.76 %），并减轻生物腐蚀。该方法为海洋应用中镁保护涂层的构建提供了有效的策略。

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 Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.