Effect of Laser Surface Remelting on Microstructure and Properties of Biodegradable Zn-0.4Mn Alloy

doi:10.11902/1005.4537.2024.223

Journal of Chinese Society for Corrosion and protection

2025, Vol. 45

Issue (4): 1127-1134 DOI: 10.11902/1005.4537.2024.223

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Effect of Laser Surface Remelting on Microstructure and Properties of Biodegradable Zn-0.4Mn Alloy

YUE Rui¹^,², LIU Yongyong¹, YANG Lijing²(

), ZHU Xinglong², CHEN Quanxin², A Naer², ZHANG Qingke², SONG Zhenlun²

1 School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
2 State Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China

Cite this article:

YUE Rui, LIU Yongyong, YANG Lijing, ZHU Xinglong, CHEN Quanxin, A Naer, ZHANG Qingke, SONG Zhenlun. Effect of Laser Surface Remelting on Microstructure and Properties of Biodegradable Zn-0.4Mn Alloy. Journal of Chinese Society for Corrosion and protection, 2025, 45(4): 1127-1134.

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Abstract

Zn-alloys are regarded as promising biodegradable metallic materials due to their low corrosion rates and favorable cytocompatibility. To address the challenges associated with the Zn-0.4Mn alloy, which exhibits better ductility but lower surface hardness, wear resistance, and cytocompatibility etc., herein, the effect of surface laser remelting on the microstructure, microhardness, wear resistance, corrosion resistance, and cytocompatibility of the Zn-0.4Mn alloy was assessed. The findings revealed that the surface hardness and wear resistance of the remelted Zn-0.4Mn alloy were significantly enhanced. Furthermore, a reduction in corrosion current density and an increase in impedance indicated that laser remelting improved the corrosion resistance of the Zn-0.4Mn alloy. Additionally, L929 cytotoxicity tests demonstrated that the biocompatibility of the Zn-alloy was enhanced due to improved corrosion resistance and reduced leaching of Zn ions. Consequently, laser remelting emerges as an effective method for improving the mechanical properties, degradation characteristics, and biosafety of Zn-alloys.

Key words: Zn-alloy laser surface remelting microhardness abrasion resistance corrosion resistance

Received: 26 July 2024 32134.14.1005.4537.2024.223

ZTFLH:

TG174.4

Fund: Zhejiang Province Leading Earth Goose + X Program(2024C03078);Ningbo International R&D Collaboration Project(2023H022);Ningbo Youth Science and Technology Innovation Leading Talent Project(2023QL014)

Corresponding Authors: YANG Lijing, E-mail: yanglj@nimte.ac.cn

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	Articles by authors
	YUE Rui
	LIU Yongyong
	YANG Lijing
	ZHU Xinglong
	CHEN Quanxin
	A Naer
	ZHANG Qingke
	SONG Zhenlun

URL:

https://www.jcscp.org/EN/10.11902/1005.4537.2024.223 OR https://www.jcscp.org/EN/Y2025/V45/I4/1127

Fig.1 Schematic diagram of nanoindentation test

Composition	Concentration
Na⁺	142 mmol/L
K⁺	5.0 mmol/L
Ca²⁺	2.5 mmol/L
Mg²⁺	1.5 mmol/L
HCO $3 -$	4.2 mmol/L
Cl^-	147 mmol/L
HPO $4 2 -$	1 mmol/L
SO $4 2 -$	0.5 mmol/L
Tris	6.069 g/L

Table 1 Ion concentration of SBF solution^[23]

Fig.2 Surface (a) and cross sectional (b) morphologies of the LSR-treated Zn-0.4Mn alloy

Fig.3 XRD patterns of the Zn-0.4Mn alloy and LSR-treated Zn-0.4Mn alloy

Fig.4 Load-depth curve (a) and brinell hardness distribution curve (b) of LSR-treated Zn-0.4Mn alloy at a load of 5 μN and a duration of 10 s

Fig.5 Samples were tested for friction and wear at a force of 2 N and a frequency of 2 Hz for 1800 s: (a) evolution of friction coefficient, (b) wear depth of the Zn-0.4Mn alloy, (c) wear depth of the LSR-treated Zn-0.4Mn alloy

Table 2 Friction coefficients and wear depth

Fig.6 Corrosion morphologies of Zn-0.4Mn alloy (a, b) and LSR-treated Zn-0.4Mn alloy (c, d) with (a, c) and without (b, d) corrosion products after immersed in SBF for 3 d (a1-d1), 7 d (a2-d2) and 15 d (a3-d3)

Fig.7 Polarization curves (a), Nyquist (b) and Bode plots (c) of specimens after immersion in SBF solution for 30 min

Table 3 PDP test results in SBF solutions

Table 4 Results of EIS fitting in SBF solution

Fig.8 Growth morphologies of L-929 cells cultured for various times in Zn-0.4Mn alloy (a), LSR-treated Zn-0.4Mn alloy (b) and comparison group (c) with 25% concentration of extracts

Table 5 Results of ICP-OES determination of the elements in the sample extract

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