J. Mater. Sci. Technol. ›› 2026, Vol. 268: 312-323.DOI: 10.1016/j.jmst.2026.01.007

• Research Article • Previous Articles    

In vitro corrosion behaviors of representative plastic deformed biodegradable Zn-0.8Li alloy in normal saline solution

Donglei Hea,b, Mengran Zhoua,b,*, Zhenhai Daic, Ziyue Zhanga,b, Xinze Donga,b, Gaoqiang Chena,b, Yuru Zhaa,b, Yuxiang Hana,b, Li Zhongc, Yixing Zhud, Weikang Zhaoe, Fan Liuf, Timo Lehtoneng, Fan Yeh, Qingyu Shia,b, Yake Liuf,*   

  1. aState Key Laboratory of Clean and Efficient Turbomachinery Power Equipment, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;
    bKey Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, China;
    cSchool of Mechatronics and Vehicle Engineering, Chongqing Jiaotong University, Chongqing 400074, China;
    dSchool of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China;
    eDepartment of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China;
    fDepartment of Orthopedics, Affiliated Hospital of Nantong University, Nantong 226001, China;
    gBioretec Ltd. FI-33710 Tampere, Finland;
    hSchool of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen 361021, China
  • Received:2025-09-24 Revised:2026-01-03 Accepted:2026-01-04 Online:2026-01-12
  • Contact: *E-mail addresses:zhoumr888@mail.tsinghua.edu.cn(M. Zhou), yakeliu@ntu.edu.cn(Y. Liu)

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Abstract: In this work, as-cast Zn-0.8Li was processed by different representative plastic deformation methods, namely hot rolling (AR), friction stir processing (FSP), and friction stir processing followed by hot rolling (FSP+R), which will be potentially applied to strengthen this material in the future. The microstructure and corrosion behaviors of the materials were systematically investigated. AR and FSP Zn-0.8Li showed homogeneous microstructure, while the others presented coarse and nonuniform microstructure. FSP Zn-0.8Li exhibited the highest corrosion resistance due to its fine and homogeneous microstructure and the absence of primary β-LiZn4. All the Zn-0.8Li showed similar corrosion progress. A two-layered corrosion product composed of Zn5(CO3)2(OH)6, a dominated outer layer, and a Zn5(OH)8Cl2·H2O dominated inner layer was formed in the early immersion. An additional inner layer of ZnO was formed due to insufficient supply of CO2 and Clâˆ', resulting in a three-layered corrosion product in the long term of immersion.

Key words: Biodegradable metal, Zinc alloy, Corrosion behavior, Friction stir processing

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