Recrystallization Behavior of MgAl Layered Double Hydroxide Films on Anodized Magnesium Alloys During Phytic Acid Loading.

IF 4.8 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Nanomaterials Pub Date : 2026-10-12 DOI:10.3390/nano16201292

Jiahao Wu, Wenjun Ci, Yuanfang Deng, Jiajia Yuan, Junlan Li, Xu Dai

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Abstract

MgAl layered double hydroxides (LDHs) films were prepared via an in-situ growth method on anodized AZ31 magnesium alloy. Subsequently, phytic acid (PA) was loaded as a corrosion inhibitor through an anion-exchange process. The structural evolution of the LDHs nanosheets during the loading process was systematically investigated. The structure, morphology, and composition of the films were characterized using field-emission scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, and glow discharge optical emission spectroscopy. The corrosion behavior was evaluated using potentiodynamic polarization curves and electrochemical impedance spectroscopy. The results revealed that during the first four hours of ion exchange in the PA solution, the LDHs nanosheets underwent a fragmentation-recrystallization process. The incorporation of the corrosion inhibitor significantly enhanced both the stability of the LDHs nanosheets and the long-term corrosion protection of the substrate. Furthermore, a recrystallization mechanism for the LDHs nanosheets on the anodized AZ31 Mg alloy is proposed.

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植酸加载过程中MgAl层状双氢氧化物膜在阳极氧化镁合金上的再结晶行为。

采用原位生长法在阳极氧化AZ31镁合金表面制备了MgAl层状双氢氧化物（LDHs）薄膜。随后，植酸（PA）作为缓蚀剂通过阴离子交换过程加载。系统地研究了负载过程中LDHs纳米片的结构演变。利用场发射扫描电镜、x射线衍射、能量色散x射线光谱、傅里叶变换红外光谱和辉光发射光谱对膜的结构、形貌和组成进行了表征。利用动电位极化曲线和电化学阻抗谱对腐蚀行为进行了评价。结果表明，在PA溶液中离子交换的前4小时，LDHs纳米片经历了一个破碎-再结晶过程。缓蚀剂的掺入显著提高了LDHs纳米片的稳定性和衬底的长期防腐能力。在此基础上，提出了LDHs纳米片在阳极氧化AZ31镁合金上再结晶的机理。

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

Nanomaterials NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

8.50

自引率

9.40%

发文量

3841

审稿时长

14.22 days

期刊介绍： Nanomaterials (ISSN 2076-4991) is an international and interdisciplinary scholarly open access journal. It publishes reviews, regular research papers, communications, and short notes that are relevant to any field of study that involves nanomaterials, with respect to their science and application. Thus, theoretical and experimental articles will be accepted, along with articles that deal with the synthesis and use of nanomaterials. Articles that synthesize information from multiple fields, and which place discoveries within a broader context, will be preferred. There is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental or methodical details, or both, must be provided for research articles. Computed data or files regarding the full details of the experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material. Nanomaterials is dedicated to a high scientific standard. All manuscripts undergo a rigorous reviewing process and decisions are based on the recommendations of independent reviewers.