Electrodeposition of Nanocrystalline Ni-Mo Alloys from Alkaline Glycinate Solutions

摘要

The induced electrodeposition of nanocrystalline Ni-Mo alloys was investigated using two different2+ molar ratios of Ni:Mo in sodium glycinate solution at pH 9.3. The chemical nature of the Ni and2- MoO4 in alkaline glycinate solution was studied using UV-Vis absorption spectroscopy. Thecomposition of the coating layer was determined using EDX. The crystallinity of electrodeposits wasexamined using XRD, whereas, the morphology and topography were investigated using SEM andAFM, respectively. The corrosion resistance of Ni-Mo alloys compared to pure Ni was studied in 3.5% NaCl solution using potentiodynamic polarization and electrochemical impedance techniques. Ni- 2- 2+ Mo alloy electrodeposited from the solution containing [MoO4 ]/[Ni ] molar ratio of 0.2 show highercorrosion resistance compared to plating solutions of molar ratio 0.1 and pure Ni.