نوع مقاله : مقاله علمی پژوهشی
نویسندگان
1 گروه شیمی، دانشگاه سید جمال الدین اسدآبادی، اسدآباد، ایران
2 گروه شیمی- دانشگاه سیدجمال الدین اسدآبادی- اسدآباد- ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In the present study, nickel-zinc-phosphorus/boron carbide nanocomposite coatings were synthesized via electrodeposition from an electrolyte containing different concentrations of boron carbide as reinforcing particles, using an optimized current density of 50 mA/cm2. In subsequent investigations, the surface morphology, phase structure, and elemental composition of the coatings were conducted using scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy dispersive X-ray spectroscopy (EDS), respectively. The corrosion resistance of the fabricated coatings was evaluated by electrochemical impedance spectroscopy (EIS), open‑circuit potential (OCP) measurements, and Tafel‑polarization studies in a 3.5 % NaCl solution. These studies demonstrated that composite coatings with smooth and uniform surfaces have higher corrosion resistance than pure Ni-P-Zn alloy coatings, and the lowest corrosion current density and highest corrosion resistance were obtained for the coating produced from a solution containing 6 6 g/L B4C. Co‑deposition at this optimal B4C concentration yielded a uniform, defect‑free, dense microstructure, thereby enhancing the corrosion behavior of the coatings.
کلیدواژهها [English]