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Corrosion Resistant and UV Durable PVDF-Co-HFP /Al2O3 Superhydrophobic Nanocomposite Coating for Aluminum

材料科学 接触角 润湿 涂层 纳米复合材料 扫描电子显微镜 复合材料 傅里叶变换红外光谱 介电谱 表面粗糙度 超疏水涂料 化学工程 电化学 工程类 物理化学 化学 电极
作者
Ahmed Bahgat,Aboubakr M. Abdullah,Adel Mohamed,Mariam Al-Ali AlMaadeed
出处
期刊:Meeting abstracts 卷期号:MA2016-02 (14): 1344-1344
标识
DOI:10.1149/ma2016-02/14/1344
摘要

The interest in superhydrophobic surfaces, which demonstrate high water-repellency, have recently increased dramatically because of their wide range of applications in many fields. The two major needed conditions to get a nanostructured superhydrophobic surfaces are the optimum surface roughness and low surface energy. In our present work, the fabrication process of a porous superhydrophobic coating on aluminum surfaces was achieved using a one-step electrospinning technique. The wettability properties of the prepared coating was inspected by measuring the water contact (WCA) and sliding angle (WCAH) before the addition of Al 2 O 3 nanoparticles (150±2.9 and 6.25±1) while the measured WCA and WCAH after addition of nanoparticles was found to be 152±0.59 and 5±2.5, respectively. The wettability of the prepared coatings was inspected also after being irradiated with strong ultraviolet (UV) radiation of 1.5 W/m 2 at a high temperature of 70 °C for 64 h. In fact no big difference was noticed after the UV test with respect to the wettability properties. The morphology of the superhydrophobic coating was studied using scanning electron microscope (SEM) coupled with energy dispersive X-ray (EDX). It shows the formation of a beaded fiber structure. Furthermore, Fourier transform infrared (FTIR) spectroscopy was used to check the nanocomposite coating before and after irradiation with UV. The surface roughness of the composite materials were measured using atomic force microscope (AFM). The corrosion behavior of the superhydrophobic nanocomposite coating was evaluated by the electrochemical impedance spectroscopy (EIS) and the potentiodynamic polarization in 3.5% NaCl. The results have shown that new nanocomposite coating exhibits a very high corrosion resistance.

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