基于镁合金 AZ31 的 LDHs@ZIF-67 复合涂层的制造和腐蚀性能评估

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2024-11-14 DOI:10.1016/j.surfcoat.2024.131551

Yonghua Chen , Zhenzhen Tian , Fubing Yu , Mingyi Wu , Wenhui Yao , Yuantai He , Yuan Yuan , Zhihui Xie , Guozhi Wu , Jiahao Wu , Fusheng Pan , Liang Wu

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引用次数: 0

摘要

由于镁（Mg）和镁合金的耐腐蚀性较差，其广泛应用受到了限制。微弧氧化（MAO）的防腐性能不够理想。因此，本研究在 MAO 涂层镁合金上制备了各种 LDHs@ZIF-67 复合涂层。研究了 LDHs@ZIF-67 复合涂层的表面和界面结构、成分、腐蚀稳定性和机理。结果表明，镁钴 LDHs@ZIF-67 涂层具有最低的腐蚀电流密度（icorr = 2.51 × 10-8 A/cm2）、最低的腐蚀速率（氢演化体积 = 3.21 mL-cm-2）和最佳的耐腐蚀性。LDHs 和 ZIF-67 结构的稳定存在协同产生了更致密的复合涂层，增强了 AZ31 的耐腐蚀性，在提供长期腐蚀保护方面超越了单种材料的局限性。这种复合涂层有望为普遍存在的金属腐蚀问题提供有效的解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Fabrication and corrosion performance evaluation of LDHs@ZIF-67 composite coatings based on magnesium alloys AZ31

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Fabrication and corrosion performance evaluation of LDHs@ZIF-67 composite coatings based on magnesium alloys AZ31

The widespread application of magnesium (Mg) and Mg alloys is limited by their poor corrosion resistance. The anti-corrosion performance of micro-arc oxidation (MAO) is not ideal enough. Therefore, this study fabricated various LDHs@ZIF-67 composite coatings on MAO-coated Mg alloy. The surface and interface structure, composition, corrosion stability and mechanism of the LDHs@ZIF-67 composite coatings were investigated. The results suggested that the MgCo LDHs@ZIF-67 coating represented the lowest corrosion current density (i_corr = 2.51 × 10⁻⁸ A/cm²), the lowest corrosion rate (hydrogen evolution volume = 3.21 mL·cm⁻²) and the best corrosion resistance. The stable existence of LDHs and ZIF-67 structures synergistically integrated to produce a denser composite coating, enhancing the corrosion resistance of AZ31, and surpassing the limitations of individual materials in providing long-term corrosion protection. Such composite coatings are poised to offer efficacious solutions to prevalent metal corrosion issues.

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.