College of Materials Science and Engineering, Shenzhen University, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, 518060 Shenzhen, China.
College of Materials Science and Engineering, Shenzhen University, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, 518060 Shenzhen, China.
J Colloid Interface Sci. 2022 Mar 15;610:202-212. doi: 10.1016/j.jcis.2021.12.018. Epub 2021 Dec 6.
In situ grown layered double hydroxide (LDH) is commonly used one of the anticorrosion ways for metal materials; Due to the dense growth of LDH on the metal surface, its special layered structure can effectively delay the corrosion rate of metal.
In this study, we use a hydrothermal method to successfully grow Mg-Fe LDH film on steel substrates based on self-supplied Fe ions. The films were characterized by X-ray diffraction, scanning electron microscopy, and X-ray energy dispersive spectrometry. The potential corrosion resistance of the obtained Mg-Fe LDH film was confirmed using electrochemical impedance spectroscopy and polarization curves.
After systematic adjustment and parameter optimization, it was found that Mg-Fe LDH film exhibited the best growth morphology and comprehensive performance with an initial pH value of 10, Mg/urea ratio of 1:4 and reaction time of 12 h. The SEM and electrochemical results further demonstrated that Mg-Fe LDH film play a good protection effect on carbon steel surface. This study provides an important reference for the processing of anticorrosion LDHs film.
在原位生长的层状双氢氧化物（LDH）是金属材料常用的防腐方法之一；由于 LDH 在金属表面的密集生长，其特殊的层状结构可以有效地延迟金属的腐蚀速率。
在这项研究中，我们使用水热法在钢基体上成功地生长出基于自供应 Fe 离子的 Mg-Fe LDH 薄膜。通过 X 射线衍射、扫描电子显微镜和 X 射线能量色散谱对薄膜进行了表征。通过电化学阻抗谱和极化曲线确认了所获得的 Mg-Fe LDH 薄膜的耐腐蚀性。
经过系统的调整和参数优化，发现当初始 pH 值为 10、Mg/尿素摩尔比为 1:4 和反应时间为 12 h 时，Mg-Fe LDH 薄膜具有最佳的生长形貌和综合性能。SEM 和电化学结果进一步证明了 Mg-Fe LDH 薄膜对碳钢表面具有良好的保护作用。本研究为处理防腐 LDHs 薄膜提供了重要参考。
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