Effects of ultrasonic dispersion on structure of electrodeposited Ni coating on AZ91D magnesium alloy

来源期刊：中国有色金属学报(英文版)2010年增刊第2期

论文作者：吴化 赵国良 穆君伟 李雪松 何毅

文章页码：703 - 707

Key words：AZ91D magnesium alloy; Cu-Sn layer; Ni coating; electrodeposition; ultrasonic dispersion

Abstract: To obtain the refined electrodeposited nickel layer on AZ91D magnesium alloy, ultrasonic technology was applied in the processes of pre-treatment and electrodeposition. The phases of pre-treatment layer and the nickel coating were analyzed by X-ray diffractometry (XRD) and X-ray photoelectron spectroscopy (XPS), and the microstructure was observed by scanning electron microscopy (SEM). Then, the effects of ultrasonic dispersion on the microstructure of pre-treatment layer and the grain refinement of electrodeposited nickel layer were discussed. The results showed that the pre-treatment electrodeposited Cu-Sn layer with compact microstructure could be synthesized in alkaline copper-tin liquid with ultrasonic agitation, as a result, smooth and refined nickel coating formed on AZ91D magnesium alloy. On the other hand, preferred orientation in the coating decreased because of the refined grains.