吉林大学学报(工学版) ›› 2011, Vol. 41 ›› Issue (01): 78-0083.

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Chromium-free pretreatment and Ni-P alloys technology on magnesium alloy

ZHANG Wen-xue1, ZHOU Zhen-jun1,HE Cheng2,LI Gang3   

  • Received:2009-06-24 Online:2011-01-01 Published:2011-01-01

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Abstract:

A chromiumfree solution pretreatment technology on AZ91D magnesium alloy substrate is investigated. Then, by selecting suitable complexing agent, subsequent Ni-P plating is conducted in a plating bath where nickel ions are provided by sulfate nickel. A uniform, compact and defect free plating layer is obtained by this technology, which exhibits good anticorrosion properties compared with traditional pretreatment. The effect of the chromiumfree pretreatment of the magnesium alloy substrate on the electroless Ni-P plating was also investigated. The deposit was characterized by its structure, morphology, anticorrosion properties and microhardness.

Key words: materials failure and protection, magnesium alloy, electroless deposition, nickelbased alloy, corrosion resistance

CLC Number: 

  • TG174.4
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