Synergistic enhancement of corrosion resistance and photocatalytic activity on AZ31 Mg alloy using chelating agent-infused layered double hydroxides over plasma electrolytic oxidation coatings

IF 23.2 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES
Mohammad Aadil, Talitha Tara Thanaa, Mohammad Alkaseem, Mosab Kaseem
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引用次数: 0

Abstract

This study introduces a novel approach to enhance the functionality of AZ31 magnesium alloy by integrating plasma electrolytic oxidation (PEO) with layered double hydroxides (LDH), followed by strategic post-treatments using chelating agents. Chelating agents, including nitrilotriacetic acid (NTA), diethylenetriaminepentaacetic acid (DTPA), and ethylenediaminetetraacetic acid (EDTA), were incorporated to modify the LDH structure, resulting in tailored coating morphology and functionality. Among the tested systems, the LDH-EDTA coating exhibited a unique sieve-like structure with well-defined crystalline flakes embedded in the matrix, enhancing crystallinity and structural integration. The superior chelation effect of EDTA led to more organized growth of LDH flakes, contributing to robust chemical stability and a compact coating that effectively sealed surface micropores. This morphology provided a total polarization resistance of 3.62 × 108 Ω·cm2, demonstrating robust corrosion resistance. Furthermore, the LDH-EDTA system achieved 99.12% degradation of indigo carmine within 15 min, showing exceptional photocatalytic performance. Density functional theory (DFT) simulations provided deeper insights into the strong molecular interactions between indigo carmine and the LDH-EDTA matrix, supporting the enhanced experimental photocatalytic activity and stability.

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来源期刊
CiteScore
26.00
自引率
21.40%
发文量
185
期刊介绍: Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.
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