نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشگاه علم و صنعت ایران
2 پژوهشگاه مواد و انرژی کرج
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In this research, a hydrophobic double layer Mg-Al LDH hydroxide coating has been synthesized on AZ31 magnesium alloy through a facile hydrothermal method followed by chemical modification by stearic acid. The characteristics of the intended coatings were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and infrared spectroscopy (FT-IR). XRD and SEM patterns showed that the LDH film surfaces were nano/micro-layered and the LDH sheets tended to grow vertically on the surface. The static contact angle (CA) was calculated for different surfaces of the samples, which was found to be around 114.4 degree. The corrosion resistance of LDH-SA hydrophobic coating was measured using electrochemical spectroscopy (EIS) and dynamic polarization (PDP) test and the equivalent circuit of the investigated system was drawn. EIS measurement and polarization curve showed that the hydrophobic coated magnesium alloy had better corrosion resistance in 3.5 wt% NaCl solution. The value of Z for the coating containing stearic acid is close to 10^5 Ω.m^2.
کلیدواژهها [English]