Reverse pulse electrodeposition of Zn–Ni alloys from a chloride bath

Electrodeposition of nanocrystalline Zn–Ni coatings with single gamma phase from an alkaline bath

“…Similarly, uniform chemical and phase compositions of Zn-Ni alloys are obtained in the present investigation. Moreover, the peak value of γ-phase with (411) plane orientation is higher than that of γ-phase with other orientations, which reveals that γ-phase with (411) plane orientation plays a dominant role in the coatings and the coatings with single γ-phase with (411) plane orientation can exhibit better corrosion resistance [9].…”

“…The properties and characteristics of Zn-Ni coatings are mainly determined by their microstructure and phase composition [8]. It is reported that the corrosion resistance of Zn-Ni alloy coatings with 8 to 14 wt.% of nickel and single gamma phase structure is five times higher than that of pure Zn coatings [9]. Hammami et al [10] have demonstrated the increase in corrosion resistance with deposits electrodeposited under chronopotentiometry conditions (18.32 mA/cm 2 and 36.63 mA/cm 2 ).…”

The effect of pulse electroplating on Zn–Ni alloy and Zn–Ni–Al2O3 composite coatings

“…It can be seen that the phase structure of all of deposits is single c-Ni 5 Zn 21 phase which is the desirable phase structure for Zn-Ni coatings. It has been reported that Zn-Ni coatings of single c-Ni 5 Zn 21 phase structure with Ni content in the range of 10-14 wt.% has shown five times better corrosion resistant compared to pure Zn [13,14].…”

Zn–Ni–Al2O3 nano-composite coatings prepared by sol-enhanced electroplating

“…Grain size measurement was determined based on the Scherrer line broadening equation, which is well suited to determining grain dimensions less than 100 nm and has been used widely for Zn-Ni deposits [17][18][19]. For coating deposited from bath containing 20 ml/l sol, this method cannot be used to calculate the grain size due to overlap of the most intense ␥ and phase peaks.…”