X. Guo, J. Guo, J. Dong, S. Wang, J. Gong, R. Zhu, W. Ding
Shanghai Jiao Tong University, China
pp. 456 - 459
Keywords: ionic liquid, electrodeposition, multilayers, magnesium alloy
Abstract A single bath of ionic liquid electrodeposition method has been developed for the preparation of (Ni-Cu)/(Cu-Ni) multilayers on AZ91D magnesium alloy. The technique has been used to make multilayers with a composition of (92.47at.%Ni-7.53at.%Cu) /(53.23at.%Cu-46.77at.%Ni). Cyclic voltammetry studies revealed that Cu preferentially deposits to Ni belongs to a normal electrodeposition. The layer composition and thickness can be controlled by varying the electroplating current density and time. A uniform, smooth and dense nanocrystalline(Ni-Cu)/(Cu-Ni) multilayers exhibited an excellent corrosion protection due to the electrochemical synergistic effect between the (Ni-Cu)/(Cu-Ni) multilayers. The surface morphology, cross-section morphology and corrosion behaviors of the multilayers are discussed. Key words: Ionic Liquid, Electrodeposition, Multilayers, Magnesium Alloy.