Corrosion Behavior of Mg-Zn-Y-Nd Alloy in Simulated Body Fluid

doi:10.11902/1005.4537.2019.050

Journal of Chinese Society for Corrosion and protection

2019, Vol. 39

Issue (6): 463-468 DOI: 10.11902/1005.4537.2019.050

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Corrosion Behavior of Mg-Zn-Y-Nd Alloy in Simulated Body Fluid

JIA Yizheng¹,ZHAO Mingjun²,CHENG Shijing³,WANG Baojie²,WANG Shuo⁴,SHENG Liyuan⁵,XU Daokui⁴(

)

1. Innovation and Practice Base for Postdoctors, Sichuan College of Architectural Technology, Deyang 618000, China
2. School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China
3. Chinese Academy of Sciences, Beijing 100864, China
4. Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
5. Shenzhen Key Lab Human Tissue Regenerate & Repair, Shenzhen Institute, Peking University, Shenzhen 518057, China

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Abstract

The corrosion behavior of Mg-6Zn-1.2Y-0.8Nd alloy before and after pre-soaking in Hank's solution was comparatively studied. Results revealed that the surface corrosion products formed during pre-shoaking can protect the substrate from corrosion attack to a certain extent. After pre-soaking for 4 h, the product film formed on the surface was relatively uniform and had the best protective effect on the matrix. The corrosion current density was 1.98 μA/cm². As the pre-soaking time was further extended, the corrosion products film formed on sample surfaces became thicker, and tend to be cracked and detached from the substrate, correspondingly the localized corrosion was accelerated, resulting in the decrease in their protective effect. After pre-soaking for 48 h, the corrosion current density of the alloy increased to 3.64 μA/cm².

Key words: Mg-alloy biomaterial corrosion product film localized corrosion immersion

Received: 25 April 2019

ZTFLH:

TG172.5

Fund: Supported by National Natural Science Foundation of China(51701129);Supported by National Natural Science Foundation of China(51871211);Key Technology R&D Program of Deyang City Government of China(2014ZZ051);Postdoctoral Start Fund of Shenyang Ligong University(10500010006)

Corresponding Authors: XU Daokui E-mail: dkxu@imr.ac.cn

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	JIA Yizheng
	ZHAO Mingjun
	CHENG Shijing
	WANG Baojie
	WANG Shuo
	SHENG Liyuan
	XU Daokui

Cite this article:

JIA Yizheng, ZHAO Mingjun, CHENG Shijing, WANG Baojie, WANG Shuo, SHENG Liyuan, XU Daokui. Corrosion Behavior of Mg-Zn-Y-Nd Alloy in Simulated Body Fluid. Journal of Chinese Society for Corrosion and protection, 2019, 39(6): 463-468.

URL:

https://www.jcscp.org/EN/10.11902/1005.4537.2019.050 OR https://www.jcscp.org/EN/Y2019/V39/I6/463

Fig.1 SEM image of the microstructure of Mg-6Zn-1.2Y-0.8Nd alloy (a) and EDS result of W-phase in the alloy (b)

Fig.2 Polarization curves of Mg-6Zn-1.2Y-0.8Nd alloy after pre-immersion in Hank's solution for 0~48 h (a), and enlarged detail of the area labeled in Fig.2a (b)

Table 1 Fitting results of polarization curves of Mg-6Zn-1.2Y-0.8Nd alloy before and after pre-immersion treatment in Hank's solution for different time

Fig.3 Surface corrosion morphologies and 3D images of Mg-6Zn-1.2Y-0.8Nd alloy after pre-immersion in Hank's solution for 0 h (a), 2 h (b), 4 h (c), 8 h (d), 24 h (e) and 48 h (f)

Fig.4 SEM images of the cross sections of Mg-6Zn-1.2Y-0.8Nd alloy pre-immersed in Hank's solution for 4 h (a) and 48 h (b), and EDS result of the corrosion film (c)

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