| Summary: | 碩士 === 國立臺灣大學 === 工程科學及海洋工程學研究所 === 106 === This study is divided into two prats. The first part presents an investigation into the effect of surface pretreatment on the electrochemical characteristics and corrosion behavior on graphene coated 6061 aluminum alloy (Al 6061). The corrosion properties of graphene coated 6061 aluminum alloy with different surface pretreatments were studied using electrochemical impedance spectroscopy (EIS), and polarization measurement. Surface morphologies of pretreated and coated samples were analyzed by atomic force microscopy (AFM). The integrity of graphene transferred from the growth Cu substrate was examined by Raman spectroscopy. We also investigated the adhesion between the graphene and Al 6061 by measuring the water and diiodomethane contact angle, and calculating the surface free energy of various pretreated samples.
In the second part, solving the problem that chemical vapor deposition graphene can not be made and transferred in large area, we reduced graphene oxide by NaBH4 and spray it on the surface of 6061 aluminum. The corrosion properties of reduced graphene oxide film is analyzed by potentiodyanmic polarization, and the topography and thickness of reduced graphene oxide film is observed by AFM and scanning electron microscopy (SEM).
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