A novel UV-curable composite coating with superior anti-corrosion and mechanical properties

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2024-08-20 DOI:10.1016/j.porgcoat.2024.108758

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引用次数: 0

Abstract

The UV curing method is free from volatile organic compounds (VOC) and exhibits high curing efficiency. However, pore flaws and inadequate mechanical qualities after cure greatly hinder their utilization in metal anti-corrosion. Herein, layered double hydroxides (LDH) supported by molybdic acid and cerium ions were synthesized in situ on the sericite (SC) surface, enhancing the shielding, corrosion inhibition, resin compatibility, and cross-linking density of the coating. Compared with carbon steel immersed in a 3.5 wt% NaCl solution, the incorporation of SC/KH560@LDH reduced the corrosion current density (I_corr) from 2.001 × 10⁻⁵ A/cm² to 7.883 × 10⁻⁶ A/cm². Moreover, the low-frequency impedance of the UV-SC/KH560@LDH coating remained high at 1.939 × 10¹⁰ Ω·cm² after 70 days of immersion in a 3.5 wt% NaCl solution. The excellent corrosion resistance of UV-SC/KH560@LDH can be attributed to the barrier properties of the filler, the chloride ion trapping, and the passivation effect. Furthermore, the UV-curable alkyd resin used in this work formed a chemical bond with the metal substrate, enhancing the mechanical properties of the coating. The adhesion strength of the UV-SC/KH560@LDH was measured at 11.50 MPa. The thickness loss (21.3 μm) of the UV-SC/KH560@LDH were minimal after 5000 cycles of wear. A new research concept for preparing the UV-SC/KH560@LDH with superior anti-corrosion and mechanical properties for carbon steel plate surfaces has been proposed to meet the demands of practical applications.

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具有优异防腐和机械性能的新型紫外线固化复合涂料

紫外线固化法不含挥发性有机化合物（VOC），固化效率高。然而，固化后的孔隙缺陷和机械性能不足极大地阻碍了其在金属防腐中的应用。本文在绢云母（SC）表面原位合成了以钼酸和铈离子为支撑的层状双氢氧化物（LDH），增强了涂层的屏蔽性、缓蚀性、树脂相容性和交联密度。与浸泡在 3.5 wt% NaCl 溶液中的碳钢相比，加入 SC/KH560@LDH 后，腐蚀电流密度（Icorr）从 2.001 × 10-5 A/cm2 降低到 7.883 × 10-6 A/cm2 。此外，UV-SC/KH560@LDH 涂层在 3.5 wt% 的 NaCl 溶液中浸泡 70 天后，其低频阻抗仍保持在 1.939 × 1010 Ω-cm2 的高水平。UV-SC/KH560@LDH 的优异耐腐蚀性能可归因于填料的阻隔性能、氯离子截留和钝化效果。此外，这项工作中使用的紫外固化醇酸树脂与金属基材形成了化学键，增强了涂层的机械性能。经测量，UV-SC/KH560@LDH 的附着强度为 11.50 兆帕。经过 5000 次磨损后，UV-SC/KH560@LDH 的厚度损失（21.3 μm）极小。该研究提出了一种新的制备 UV-SC/KH560@LDH 的研究理念，这种 UV-SC/KH560@LDH 具有优异的防腐和机械性能，可用于碳钢板表面，以满足实际应用的需求。

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

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.