Abstract
The present work investigated the electrochemical behavior of zinc plate treated with 3-(Aminopropyl)triethoxysilane, 3-(Trimethoxysilyl)propyl methacrylate solutions containing TiF62-, ZrF62- and modified with different concentrations of nano-particles. The morphologies of passivation films before and after immersion were characterized by scanning electron microscopy (SEM). Complementary studies were carried out with electrochemical impedance spectroscopy (EIS) and neutral salt spray test (NSS). The result showed that there are a layer of continuous and uniform film on the surface of substrate, and the film kept stable during the early period of immersion. The scanning electrochemical microscopy together with EIS showed that the anticorrosion ability increased with the rise of SiO2 nano-particles concentration, which leaded to enhanced resistance in return by higher density of corrosion.
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