环氧树脂
材料科学
傅里叶变换红外光谱
介电谱
涂层
腐蚀
纳米颗粒
扫描电子显微镜
复合材料
化学工程
盐雾试验
电化学
纳米技术
化学
物理化学
工程类
电极
作者
Ubair Abdus Samad,Mohammad Asif Alam,Arfat Anis,El‐Sayed M. Sherif,Sulaiman I. Al-Mayman,Saeed M. Al‐Zahrani
出处
期刊:Materials
[MDPI AG]
日期:2020-08-26
卷期号:13 (17): 3767-3767
被引量:24
摘要
This paper presents the studies of the development of a high-performance epoxy coating for steel substrates. To this end, it investigated the synergistic effect of incorporating zinc oxide (ZnO) nanoparticles into nanosilica containing epoxy formulations. The mechanical properties of the epoxy coating formulations were improved by modifying the surfaces of the silica nanoparticles (5 wt.%) with 3-glycidoxypropyl trimethoxysilane, which ensured their dispersal through the material. Next, the ZnO nanoparticles (1, 2, or 3 wt.%) were incorporated to improve the corrosion performance of the formulations. The anticorrosive properties of the coatings were examined by electrochemical impedance spectroscopy (EIS) of coated mild steel specimens immersed in 3.5% NaCl solution over different time intervals (1 h to 30 days). Incorporation of the ZnO nanoparticles and the nanosilica into the coating formulation improved the corrosion resistance of the epoxy coating even after long-term exposure to saline test solutions. Finally, to evaluate how the nanoparticles affected the chemical and morphological properties of the prepared coatings, the coatings were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD).
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