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Superhydrophobic and Corrosion Behavior of Electrospun PVDF-ZnO Coating

机译:电纺PVDF-ZnO涂层的超疏水性和腐蚀行为

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Corrosion is of considerable concern whenever metals and alloys are used in constructions, petroleum and gas pipelines. The present article was undertaken to investigate the hydrophobicity and corrosion resistance of PVDF polymer with and without ZnO nanoparticles using the electrospinning process. Contact angle measurements, scanning electron microscopy, SEM, Fourier transform infrared spectroscopy, FTIR and atomic force microscopy, AFM, were used to characterize the surface. The corrosion resistance of the superhydrophobic surface formed on aluminum sheet was investigated by the electrochemical impedance spectroscopy (EIS) measurements and Tafel polarization. The results show that stable superhydrophobic PVDF-ZnO coating can be fabricated on aluminum substrate with water contact angle more than 155±2 ° and contact angle hysteresis of 4.5 ±2 °. The EIS and Tafel measurements and appropriate equivalent circuit models revealed that the prepared superhydrophobic PVDF/ZnO coating has the highest corrosion resistance compared with the bare Al and the PVDF- coated Al.
机译:每当在建筑,石油和天然气管道中使用金属和合金时,腐蚀都是一个令人担忧的问题。本文旨在通过静电纺丝工艺研究带有或不带有ZnO纳米粒子的PVDF聚合物的疏水性和耐腐蚀性。接触角测量,扫描电子显微镜,SEM,傅立叶变换红外光谱,FTIR和原子力显微镜,AFM用于表征表面。通过电化学阻抗谱(EIS)测量和Tafel极化研究了铝板上形成的超疏水表面的耐腐蚀性。结果表明,可以在水接触角大于155±2°,接触角滞后为4.5±2°的铝基板上制备稳定的超疏水PVDF-ZnO涂层。 EIS和Tafel测量以及适当的等效电路模型表明,与裸露的Al和PVDF涂覆的Al相比,制备的超疏水PVDF / ZnO涂层具有最高的耐腐蚀性。

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