Enhanced anticorrosion properties of perfluoropropene-modified yttrium oxide intercalated plasma electrolytic oxidation coatings on AZ31 alloys

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2025-07-23 DOI:10.1016/j.porgcoat.2025.109540

Xiaomeng Xue , Dawei Wang , Wenbo Yang , Tongyu Kang , Qihang Gao , Quan Shan , Yipeng Gao , Zulai Li , Min Zha

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Abstract

An inorganic/organic composite coating with enhanced anticorrosion properties is developed for Mg-3Al-1Zn (AZ31) alloy by combining plasma electrolytic oxidation (PEO) and lubricant infusion. The inorganic layer is constructed by incorporating yttrium oxide (Y₂O₃) into PEO coatings, significantly improving their compactness. Subsequently, the porous structure of PEO coatings is sealed with infused perfluoropropene, serving as a robust hydrophobic barrier and forming the organic layer. This composite coating exhibits exceptional corrosion resistance, with a corrosion current density of 6.1 × 10⁻¹¹ A cm⁻², which is six orders of magnitude lower than that of the bare AZ31 alloy (2.8 × 10⁻⁵ A cm⁻²) after immersion in 3.5 wt% NaCl solution for 2 h. Prolonged immersion tests further confirm the superior durability of the composite coating, highlighting its potential for long-term applications in corrosive environments.

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AZ31合金全氟丙烯改性氧化钇插层等离子体电解氧化涂层的防腐性能

采用等离子体电解氧化（PEO）和润滑油注入相结合的方法，制备了Mg-3Al-1Zn （AZ31）合金的无机/有机复合涂层。无机层是通过将氧化钇（Y2O3）加入到PEO涂层中来构建的，显著提高了其致密性。随后，PEO涂层的多孔结构被注入全氟丙烯密封，作为一个强大的疏水屏障并形成有机层。该复合涂层具有优异的耐腐蚀性，在3.5 wt% NaCl溶液中浸泡2小时后，腐蚀电流密度为6.1 × 10−11 a cm−2，比裸AZ31合金（2.8 × 10−5 a cm−2）低6个数量级。长时间浸泡试验进一步证实了复合涂层的优异耐久性，突出了其在腐蚀环境中的长期应用潜力。

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来源期刊

Progress in Organic Coatings 工程技术-材料科学：膜

CiteScore

11.40

自引率

15.20%

发文量

577

审稿时长

48 days

期刊介绍： The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.