Poly (Orth-Aminophenol) / Graphene Nanocomposite as Efficient Material in Anticorrosion Coatings

For preparing corrosion-resistant, suitable physical properties, and adhesion coatings, and to create a strong protective layer on the metal surface, first poly (ortho-aminophenol) (POAP) and graphene were prepared by chemical synthesis. Then the nanocomposite containing ۵% graphene was prepared. To determine the morphology of nanocomposite, Fourier transform infrared spectroscopy (FT-IR), thermal stability analysis (TGA), and scanning electron microscopy (SEM) has been used. The results show that graphene is flaked shape. Using potentiodynamic polarization measurements methods, the corrosion resistance behavior of the polymer coating and coating of nanocomposite on the steel surface were compared in sodium chloride solution ۳.۵%. The results show that the nanocomposite exhibits higher corrosion resistance than pure polymer and bare steel, which can be due to the high interaction between the steel surface and the nanocomposite. The coated steel with poly-ortho-aminophenol coating shows a positive potential of about ۲۱۲ mV in corrosion potential and a corrosion rate of ۱/۵۴×۱۰-۶Acm-۲ relative to the bare steel. This phenomenon is due to the high adhesion and effective protective effect of the coating provided to prevent corrosive agents from reaching reaching corrosive agents to the metal surface. The coated steel with nanocomposite shows a positive potential displacement of about ۳۱۲ mv more than the bare steel. In addition, nanocomposite coatings show a significant decrease in the density of the current compared to other samples, which can be due to the strong interaction at the interface of mild steel surface and conjugated nanocomposite.

کلیدواژه ها:

Anticorrosion Coating ، Nano composites ، Graphene ، Ortho aminophenol ، Electrochemical ، پوشش ضد خوردگی ، نانوکامپوزیت ، گرافن ، ارتوآمینوفنل ، الکتروشیمیایی