Magnesium (Mg) alloys are lightweight materials with excellent mechanical properties, making them attractive for various applications, including aerospace, automotive, and biomedical industries. However, the practical application of Mg alloys is limited due to their high susceptibility to corrosion. Plasma electrolytic oxidation (PEO), or micro-arc oxidation (MAO), is a coating method that boosts Mg alloys’ corrosion resistance. However, despite the benefits of PEO coatings, they can still exhibit certain limitations, such as failing to maintain long-term protection as a result of their inherent porosity. To address these challenges, researchers have suggested the use of inhibitors in combination with PEO coatings on Mg alloys. Inhibitors are chemical compounds that can be incorporated into the coating or applied as a post-treatment to further boost the corrosion resistance of the PEO-coated Mg alloys. Corrosion inhibitors, whether organic or inorganic, can act by forming a protective barrier, hindering the corrosion process, or modifying the surface properties to reduce susceptibility to corrosion. Containers can be made of various materials, including polyelectrolyte shells, layered double hydroxides, polymer shells, and mesoporous inorganic materials. Encapsulating corrosion inhibitors in containers fully compatible with the coating matrix and substrate is a promising approach for their incorporation. Laboratory studies of the combination of inhibitors with PEO coatings on Mg alloys have shown promising results, demonstrating significant corrosion mitigation, extending the service life of Mg alloy components in aggressive environments, and providing self-healing properties. In general, this review presents available information on the incorporation of inhibitors with PEO coatings, which can lead to improved performance of Mg alloy components in demanding environments.

中文翻译：

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增强镁合金腐蚀防护的进展：抑制剂与 PEO 涂层相结合的协同效应的全面综述

镁 (Mg) 合金是具有优异机械性能的轻质材料，使其对各种应用具有吸引力，包括航空航天、汽车和生物医学行业。然而，由于镁合金极易腐蚀，其实际应用受到限制。等离子电解氧化（PEO）或微弧氧化（MAO）是一种提高镁合金耐腐蚀性的涂层方法。然而，尽管 PEO 涂层具有诸多优点，但它们仍然存在一定的局限性，例如由于其固有的孔隙率而无法保持长期保护。为了应对这些挑战，研究人员建议在镁合金上结合使用抑制剂和 PEO 涂层。抑制剂是一种化合物，可以掺入涂层中或作为后处理使用，以进一步提高 PEO 涂层镁合金的耐腐蚀性。腐蚀抑制剂，无论是有机的还是无机的，都可以通过形成保护屏障、阻碍腐蚀过程或改变表面特性以降低腐蚀敏感性来发挥作用。容器可以由多种材料制成，包括聚电解质壳、层状双氢氧化物、聚合物壳和介孔无机材料。将腐蚀抑制剂封装在与涂层基质和基材完全相容的容器中是一种有前途的掺入方法。镁合金上的抑制剂与 PEO 涂层相结合的实验室研究显示出良好的结果，证明可以显着缓解腐蚀，延长镁合金部件在腐蚀性环境中的使用寿命，并提供自修复性能。总的来说，本综述提供了有关将抑制剂与 PEO 涂层结合的可用信息，这可以提高镁合金部件在苛刻环境中的性能。