闪蒸peo /Ce涂层与负载LDH/环保葡萄糖酸盐的环氧涂层协同作用对AA2024T3的有效防腐

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2025-05-08 DOI:10.1016/j.porgcoat.2025.109359

Muhammad Ahsan Iqbal , Frederico Maia , Endzhe Matykina , Raul Arrabal , Marta Mohedano , Jesús M. Vega

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引用次数: 0

摘要

介绍了一种环保节能的AA2024铝合金双层长效防腐涂层体系。该系统包括一层Ce （III）基闪光等离子体电解氧化（PEO）层和一层负载葡萄糖酸盐插入层状双氢氧化物（LDHs）的环氧面漆。采用基于Na₃（P₃O₆）₃的电解质和Ce₂（SO₄）₃，在100 s氧化时间下合成了PEO层（~ 6 μm厚），具有较高的能源效率（1.52 kWh·m−2·μm−1），同时具有初始腐蚀保护作用，固定化的铈物质改善了结构致密性，增强了与有机体系后改性的附着力。为了实现有效的抗腐蚀性能，将葡萄糖酸盐插入的ldh（2.5%、5%和10%）加入到环氧面漆中，确保缓蚀剂释放可控，同时保持显著的整体干湿粘附性能。结构分析证实了葡萄糖酸盐在NaCl溶液中的成功嵌入和释放行为，而阻抗电化学评价表明，通过协同机制(i)铈修饰的PEO层增强了PEO/环氧树脂界面的稳定性，（ii）基于ldh的环氧树脂层提供了积极的保护。这种双层体系体现了一种可持续的、高性能的生态友好的防腐方法，将节能的PEO处理与多功能有机涂层相结合，以满足苛刻的应用要求。

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Active corrosion protection of AA2024T3 by the synergy of flash-PEO/Ce coating and epoxy coating loaded with LDH/eco-friendly gluconate

This study introduces an eco-friendly and energy-efficient bilayer coating system for long-term corrosion protection of AA2024 aluminium alloy. The system comprises a Ce (III)-based Flash Plasma Electrolytic Oxidation (PEO) layer and an epoxy topcoat loaded with gluconate-intercalated layered double hydroxides (LDHs). The PEO layer (∼6 μm thick) was synthesized under 100 s oxidation time using an Na₃(P₃O₆)₃-based electrolyte with Ce₂(SO₄)₃, achieving high energy efficiency (1.52 kWh·m⁻²·μm⁻¹) while providing initial corrosion protection, immobilized cerium species for improved structural compactness and enhanced adhesion for post-modification with organic systems. To enable active corrosion resistance, gluconate-intercalated LDHs (2.5 %, 5 %, and 10 %) were incorporated into the epoxy topcoat, ensuring controlled inhibitor release while maintaining significant overall dry and wet adhesion properties. Structural analyses confirmed successful gluconate intercalation and release behaviour in NaCl solution, while electrochemical evaluation by impedance demonstrated superior long-term corrosion resistance through synergistic mechanisms: (i) the cerium-modified PEO layer enhanced stability of the PEO/epoxy interface, and (ii) the LDH-based epoxy layer provided active protection. This bilayer system exemplifies a sustainable, high-performance ecofriendly approach for corrosion mitigation, bridging energy-efficient PEO treatments with multifunctional organic coatings for demanding applications.

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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.