Influence of zinc-dipping on electroless nickel coating on magnesium alloy

被引：11

作者：

Guan, Xiurong ^{[1
]}

Zhu, Hongda ^{[1
]}

Shi, Jingwei ^{[1
]}

Wei, Shoudiang ^{[1
]}

Shao, Zhongcai ^{[1
]}

Shen, Xiaoyi ^{[2
]}

机构：

[1] Shenyang Ligong Univ, Sch Environm & Chem Engn, Shenyang 110159, Liaoning, Peoples R China

[2] Northeastern Univ, Sch Met, Shenyang, Liaoning, Peoples R China

来源：

SURFACE ENGINEERING | 2019年 / 35卷 / 10期

关键词：

Magnesium alloy; zinc dipping; electroless nickel; coating; influence; CORROSION-RESISTANCE; OXIDATION COATINGS;

D O I：

10.1080/02670844.2018.1548101

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this paper, the effect of zinc dipping pretreatment on corrosion resistance of electroless nickel plating on magnesium alloy was studied. The results showed that the corrosion resistance of nickel coating was influenced greatly by the complexing agent and main salt in the zinc dipping solution, and the formula and technological conditions of zinc dipping were optimized by the orthogonal test. The optimum formulation and process conditions were as follows: C4H6O5 40 g L-1, ZnSO4 center dot 7H(2)O 40 g L-1, NaF 4 g L-1, pH 9, temperature 90 degrees C, time 10 min. The corrosion resistance, morphology and phase composition of the nickel coating prepared under the optimum conditions were analysed by SEM, XRD and electrochemical workstation. The results showed that the self-corrosion potential of the nickel coating is 0.87 V higher than the magnesium alloy substrate, the self-corrosion current reduces by two orders of magnitude and the magnesium alloy substrate is completely covered. The corrosion resistance of magnesium alloy was effectively enhanced.

引用

页码：906 / 912

页数：7

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