涂层
材料科学
腐蚀
填料(材料)
苯并三唑
复合数
氢氧化物
化学工程
复合材料
层状双氢氧化物
冶金
工程类
作者
Liang Wu,Yanning Chen,Xu Dai,Wenhui Yao,Jiahao Wu,Zhihui Xie,Bin Jiang,Yuan Yuan,Fusheng Pan
出处
期刊:Langmuir
[American Chemical Society]
日期:2022-08-09
卷期号:38 (33): 10338-10350
被引量:25
标识
DOI:10.1021/acs.langmuir.2c01915
摘要
A composite coating with good load-carrying and controlled release capabilities for the corrosion inhibitor benzotriazole (BTA) was prepared while providing active and passive corrosion protection for magnesium alloy systems. In this paper, the organic corrosion inhibitor BTA was loaded into the ZIF-8/GO hybrid (GZB), and then, the GZB composite was coated with hexadecyltrimethoxysilane (HDTMS). Then, the GZB composites carried by HDTMS were made to adhere a ternary MgAlY layered double hydroxide (LDH) coating based on microarc oxidation (MAO) coating by electrophoresis (Si-MgAlY LDH coating). The successful loading of BTA by GZB composites was verified by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). Meanwhile, the Si-MgAlY LDH coating was characterized by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. The potentiodynamic polarization curves show that the corrosion current density of the Si-MgAlY LDH coating reaches (2.08 ± 0.49) × 10–9 A/cm2, which means that the Si-MgAlY LDH coating greatly improves the corrosion resistance of magnesium alloy AZ31. The Si-MgAlY LDH coating can also achieve self-healing function in harsh environments, which is attributed to the synergistic effect of passive and active protection. The composite coating is of great significance to expand the potential applications of magnesium alloys.
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