A STUDY ON SURFACE STATE DURING THE PRETREATMENT OFELECTROLESS NICKEL PLATING ON MAGNESIUM ALLOYS

J Chin Soc Corr Pro

2001, Vol. 21

Issue (6): 340-344 DOI:

Research Report

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A STUDY ON SURFACE STATE DURING THE PRETREATMENT OFELECTROLESS NICKEL PLATING ON MAGNESIUM ALLOYS

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上海交通大学金属基复合材料国家重点实验室

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Abstract Changes of the surface state during the pretreatmen t of electroless nickel plating (EN) on magnesium alloys were studied using weig ht loss method,scanning electron microscopy (SEM) and X-ray photoelectron spectr oscopy (XPS).The results showed that the pretreatment of electroless nickel plat ing on magnesium alloys was a process of one protective film replacing another a nd magnesium was protected all the time.Due to the formation of Mg(OH)2 and Mg F2 film on the surface,alkaline cleaning and activating made little attack to the substrate.Different etching solutions gave different etch rates and resultan t morphologies.The CrOOH- containing film,which was formed during etching,disapp eared after activation.Effects of the changes of surface state during the pretre atment on subsequent EN procedure were also discussed.

Key words: electroless nickel plating magnesium alloy pretreatmen t surface

Received: 07 August 2000

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TQ153.1+2

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. A STUDY ON SURFACE STATE DURING THE PRETREATMENT OFELECTROLESS NICKEL PLATING ON MAGNESIUM ALLOYS. J Chin Soc Corr Pro, 2001, 21(6): 340-344 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2001/V21/I6/340

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