Superior tribocorrosion resistance of Mg metal matrix composite by self-sealing PEO coating

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Corrosion Science Pub Date : 2025-07-15 Epub Date: 2025-04-11 DOI:10.1016/j.corsci.2025.112938

Yu-Fei Xie , Xiaopeng Lu , Jie Wang , Xian-Zong Wang , Shanglai Liu , You Zhang , Maria Serdechnova , Carsten Blawert , Mikhail L. Zheludkevich , Fuhui Wang

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Abstract

SiC-reinforced Mg metal matrix composites (SiC/Mg MMCs) show mechanical advantages but suffer from severe corrosion. Protective self-sealing plasma electrolytic oxidation (PEO) coatings were developed using a phosphate-zirconium-fluoride (P-Zr-F) electrolyte, where additives (F⁻ and ZrF₆²⁻) were strategically introduced to form low-melting MgF₂ and stable ZrO₂ phases. The findings revealed two orders of magnitude increase in corrosion resistance and achieved 5.3 GPa hardness after PEO treatment. The coating on MMC exhibited exceptional tribocorrosion resistance, attributed to partial reactive SiC incorporation into coating and MgF₂-stabilized friction at sliding interfaces. Accelerated Mg dissolution in MMC promoted MgF₂ formation during PEO process, while SiC restricted inward coating growth, enabling outward fluoride-rich layer development. This work advances surface-tailoring strategies for MMCs in extreme environments.

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利用自密封 PEO 涂层提高镁金属基复合材料的耐摩擦腐蚀性能

SiC增强Mg金属基复合材料（SiC/Mg MMCs）具有良好的力学性能，但腐蚀严重。采用磷酸盐-氟化锆（P-Zr-F）电解液制备了保护性自密封等离子体电解氧化（PEO）涂层，并引入了F -和ZrF62 -添加剂，形成了低熔点的MgF2和稳定的ZrO2相。结果表明，PEO处理后的耐蚀性提高了两个数量级，硬度达到5.3 GPa。MMC涂层表现出优异的耐摩擦腐蚀性能，这是由于涂层中含有部分活性SiC和mgf2稳定滑动界面的摩擦。MMC中Mg的加速溶解促进了PEO过程中MgF2的形成，而SiC限制了涂层向内生长，使富氟层向外发育。这项工作推进了极端环境下mmc的表面定制策略。

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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.