ZHANG Xin,ZHANG Xiu-zhi,ZHU Hua-jun,KONG Huan-ming,LIU Pei-pei.Study on the Plating Process of Ni-SiO2 Coating for AZ91 Magnesium Alloys[J],(4):68-70
Study on the Plating Process of Ni-SiO2 Coating for AZ91 Magnesium Alloys
Received:February 07, 2012  Revised:August 20, 2012
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KeyWord:magnesium alloy  nano-sized composite electroplating  micro-hardness  corrosion resistance
              
AuthorInstitution
ZHANG Xin Taiyuan University of Science and Technology, Taiyuan , China
ZHANG Xiu-zhi Taiyuan University of Science and Technology, Taiyuan , China
ZHU Hua-jun Taiyuan University of Science and Technology, Taiyuan , China
KONG Huan-ming Taiyuan University of Science and Technology, Taiyuan , China
LIU Pei-pei Taiyuan University of Science and Technology, Taiyuan , China
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Abstract:
      The nano-sized Ni-SiO2 coating was prepared on AZ91 magnesium alloys by composite electroplating, and the effect of process parameter on the coating was studied and the optimum process was obtained. The results show that the surface of the coating is smooth and the coating posesses the best micro-hardness and corrosion resistance when the content of nano-sized SiO2 and activator is 20 g/L and 1 g/L in the electroplating bath with pH value 5~6, respectively, and the electrodepositing time is 20~30 min at 50℃ and the the cathodic current density is 1 A/dm2.
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