ADHESION MECHANISM OF DIRECT ELECTROLESSNICKEL COATING ON MAGNESIUM ALLOYS〖ST〗〖HT〗〖WT〗〖KH1D〗

J Chin Soc Corr Pro

2002, Vol. 22

Issue (4): 233-236 DOI:

Research Report

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ADHESION MECHANISM OF DIRECT ELECTROLESSNICKEL COATING ON MAGNESIUM ALLOYS〖ST〗〖HT〗〖WT〗〖KH1D〗

Xinkuan Liu;Yanghui Xiang;Wenbin Hu

上海交通大学材料科学与工程学院

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Xinkuan Liu; Yanghui Xiang; Wenbin Hu. ADHESION MECHANISM OF DIRECT ELECTROLESSNICKEL COATING ON MAGNESIUM ALLOYS〖ST〗〖HT〗〖WT〗〖KH1D〗. J Chin Soc Corr Pro, 2002, 22(4): 233-236 .

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Abstract The theoretical calculation and XPS analysis show t hat the fluoride layer formed during activation in hydrogen fluoride acid dissol ves little in electroless plating bath.The adhesive characteristics of nickel co ating with the magnesium alloys matrix were studied by means of the analysis of the initially deposited nickel and the cross section of the coating as well as t he fracture surface by using TEM,XPS,SAM.It is shown that there exists a mixture co mpound layer above the matrix surface between the magnesium and the nickel coati ng,which consists of fluoride,nickel and the composition of plating bath.Fractur e usually occurs in the mixture layer which is the weakest link for the adhesion of nickel coating on the magnesium alloys.

Key words: magnesium alloy direct electroless nickel plating adh esion mechanism fluoride

Received: 13 January 2001

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