Abstract
Due to usage of different materials in corrosive environment, the importance of corrosion resistance composite coating is interestingly increasing. In the present study, the effect of pulse current parameters, such as pulse frequency and duty cycle, on microstructure and corrosion behaviour of Ni–Fe–TiO2 composite, coating on a bath containing optimized consternation of TiO2 nanoparticles, was studied. Field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), potansiodynamic polarization and electrochemical impedance spectroscopy (EIS) were used to evaluation of microstructure, phase identification and corrosion behaviour, respectively. The results showed that, the corrosion resistance of pulse current coated samples improved in comparison with direct current (DC) sample. In addition, the corrosion resistance of the layer was increased in higher frequencies and lower duty cycles. Furthermore, the results of SEM corresponded that the micro cracks with increasing the frequency were decreased. Moreover, the EDS data proved that, with decreasing the duty cycle the number of embedded particles were raised from 1 to 7% weight percent, also with increasing the frequency this rate was increased from 2 to 6% weight percent. The X-ray analyse was carried out and it showed that crystallite diffraction planes were the same in various pulse frequency and duty cycles and a specific peak was detected which was considered as Ni3Fe, although the crystallite size were declined in higher frequencies.
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Heidarinassab, S., Afshar, M.R. & Tavandashti, N.P. The Influence of Pulse Current Parameters on Microstructure, Morphology, and Corrosion Behaviour of the Electrodeposited Ni–Fe–TiO2 Composite Coating. Prot Met Phys Chem Surf 58, 1044–1053 (2022). https://doi.org/10.1134/S2070205122050082
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DOI: https://doi.org/10.1134/S2070205122050082