Influence of pH on Electroless Ni-P-γAl₂O₃ Composite Plating on AZ91D Magnesium Alloy by Ultrasonic Wave

Abstract:

A dense electroless plating was obtained through the process of chemical Ni-P-γAl₂O₃ composite plating by ultrasonic wave. The influence of pH on deposition rate, microstructure, coating thickness and microhardness of the composite plating was studied. The deposition rates of the coating is the fastest at pH value of 7,which is 17.9×10^-5g/cm²/min.The microstructure of the Ni-P-γAl₂O₃ coatings were analyzed by scanning electron microscopy (SEM). The results indicate that the influence of pH value on magnesium alloy is very large.And the composite coating obtained at pH value of 7 possesses optimal integrated properties, which shows uniform and compact. The plating obtained at pH value of 7 is the thicknest.

• Periodical: Applied Mechanics and Materials (Volume 665)
• Pages: 95-98
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.665.95
• Online since: October 2014
• Authors: Yong Zhe Fan*, Jin Qiu, Rui Na Ma
• Keywords: AZ91D Magnesium Alloy, Electroless Ni-P-γAl₂O₃ Composite Plating, Ultrasonic

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