ELECTROLESS NICKEL PLATING ON AZ31 MAGNESIUM ALLOY SURFACE

Cor Sci Pro Tech

2009, Vol. 21

Issue (4): 370-373 DOI:

研究报告

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ELECTROLESS NICKEL PLATING ON AZ31 MAGNESIUM ALLOY SURFACE

SHI Xi-chang; YANG Hui-lan; XIAO Xiang; XU Hui; CHEN Bai-zhen; YANG Xi-yun

School of Metallurgical Science and Engineering;Central South University;Changsha 410083

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Abstract

It was studied that the process of direct electroless plating on the surface of AZ31 magnesium alloy.The optimum formula of the bath is NiSO₄·6H₂O 25 g/L,NaH₂PO₂·H₂O 25 g/L,citric acid 15 g/L,NH4F 10 g/L and thiourea 1 mg/L.The good electroless plated coating consisted of Ni-P was obtained in the bath with pH=9.0 at 85℃ for 1 hour.The thickness of the electroless plating is more than 10 μm.The morphology of the nickel-phosphorus coating was studied using SEM.Its phase constituent and composition were examined by XRD and EDS.The corrosion behavior of the nickel-phosphorus coating was studied by Tafel polarization in a 3.5% NaCl solution.The results showed that nickelphosphorus coatings had a significantly better corrosion resistance than AZ31.

Key words: AZ31 magnesium alloy electroless plating Ni-P corrosion resistance

Received: 15 January 2008

TG174.4

Corresponding Authors: SHI Xi-chang E-mail: xichangshi@yahoo.com.cn

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Cite this article:

SHI Xi-chang; YANG Hui-lan; XIAO Xiang; XU Hui; CHEN Bai-zhen; YANG Xi-yun. ELECTROLESS NICKEL PLATING ON AZ31 MAGNESIUM ALLOY SURFACE. Cor Sci Pro Tech, 2009, 21(4): 370-373.

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https://www.cspt.org.cn/EN/ OR https://www.cspt.org.cn/EN/Y2009/V21/I4/370

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