J. Mater. Sci. Technol. ›› 2023, Vol. 151: 245-257.DOI: 10.1016/j.jmst.2022.12.045

• Research Article • Previous Articles    

Significant influence of trace Li on the mechanical properties, corrosion behavior, and antibacterial properties of biodegradable Zn-4Cu alloys

Shiyu Huang, Heng Liu, Yanjing Su, Lijie Qiao*, Yu Yan*   

  1. Beijing Advanced Innovation Center for Materials Genome Engineering, Corrosion and Protection Center, Institute for Advanced Materials and Technology, University of Science and Technology, Beijing 100083, China
  • Received:2022-03-22 Revised:2022-11-22 Accepted:2022-12-06 Published:2023-07-10 Online:2023-02-26
  • Contact: * E-mail addresses: lqiao@ustb.edu.cn (L. Qiao), yanyu@ustb.edu.cn (Y. Yan).

Abstract: In this work, trace Li was introduced to strengthen Zn-4Cu alloys. The results indicated that trace amounts of Li contributed to a significant increase in strength, resulting in an acceptable loss of elongation at fracture. Additionally, Li in the form of LiZn4 led to more intensive galvanic corrosion, which accelerated the early corrosion rate. The release of a large amount of Zn2+, caused by the addition of Li, affected the phase composition of the main Zn-containing corrosion products. Moreover, the inhibition effect of the alloy on Staphylococcus aureus (S. aureus) was enhanced by the addition of 0.02 wt.% Li.

Key words: Microalloying, Zn-Cu alloy, LiZn4/Zn pairs, Biodegradable mechanism, SKPFM