Hybrid effect of an in situ multilayer Zn–ZnO–Cr2O3 electrodeposited nanocomposite coatings for extended application

Multifunctional composite coatings of Zn?ZnO?Cr₂O₃ were deposited electrolytically on prepared carbon mild steel (CS) from Zn electrolyte, having Zn²⁺ ions and uniformly dispersed nano ZnO?Cr₂O₃ particulates. The corrosion resistance characteristics of the deposited coatings were evaluated using the linear polarization measurement method in 3.65% NaCl. The microstructural properties of the produced multilayered coatings were evaluated by scanning electron microscope (SEM) equipped with an energy dispersive spectrometer (EDS), x-ray diffraction (XRD), and atomic force microscope (AFM). Thermal deformations were observed after 4 h at 250°C and the mechanical response of the coated samples was investigated using a diamond-based Dura Scan microhardness tester and a MTR-300dry abrasive wear tester. From the results, a significant improvement in the corrosion performance of coatings was observed with bath containing less than 2 g/L. The microhardness, thermal stability, and anti-wear properties of Zn?ZnO?Cr₂O₃ shows improved performance against Zn?ZnO coating matrixes, which was attributed to dispersive strengthening effect and grain induced effect of the ZnO/Cr₂O₃ particulate.     

Computer aided simulation and performance evaluation of additive manufacturing technology for component parts manufacturing

The International Journal of Advanced Manufacturing Technology - Additive manufacturing technology involving the deposition of materials in successive layers provides a realistic possibility for...