Homogenization pretreatment and electroless Ni-P plating on AZ91D magnesium alloy

被引：9

作者：

Sun, Can ^{[1
]}

Guo, Xing-wu ^{[1
,2
]}

Wang, Shao-hua ^{[1
]}

Guo, Jia-cheng ^{[1
]}

Ding, Wen-jiang ^{[1
,2
]}

机构：

[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2014年 / 24卷 / 12期

基金：

中国国家自然科学基金;

关键词：

AZ91D magnesium alloy; homogenization pretreatment; electroless nickel plating; corrosion; CORROSION; MG; COATINGS;

D O I：

10.1016/S1003-6326(14)63539-1

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Electroless nickel plating on AZ91D substrate with a new and eco-friendly pretreatment process based on tuning an electrochemical homogeneous surface was investigated. The morphology, deposition process, chemical composition and microstructure of Ni-P coating were studied. It is indicated that beta phases are selectively removed, producing a microstructural homogeneous surface and the subsequent uniform and compact Zn immersion layer. A defect-free and well adhesive Ni-P coating can be successfully obtained due to its uniform nucleation and growth based on such pretreatment. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) tests reveal that Ni-P coating could significantly improve the corrosion resistance of AZ91D substrate.

引用

页码：3825 / 3833

页数：9

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