J. Mater. Sci. Technol. ›› 2025, Vol. 216: 66-80.DOI: 10.1016/j.jmst.2024.07.040

• Research Article • Previous Articles     Next Articles

Bridge for the thermodynamics and kinetics of electrochemical corrosion: The design of self-densified plasma electrolytic oxidation coating on Mg alloys

Peng Zhoua, Chen Lib, Guangyao Jiaob, Tingxi Lvb, Tao Zhangb,∗, Fuhui Wangb   

  1. aThe State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China;
    bCorrosion and Protection Center, Northeastern University, Shenyang 110819, China
  • Received:2024-05-07 Revised:2024-07-02 Accepted:2024-07-21 Published:2025-05-01 Online:2024-08-22
  • Contact: *E-mail address: zhangtao@mail.neu.edu.cn (T. Zhang)

Abstract: A new perspective was reported to design the self-densified plasma electrolytic oxidation (SDF-PEO) coatings on magnesium alloys based on the dissolution-ionization-diffusion-deposition (DIDD) model. The main considerations of the new PEO electrolyte include the establishment of a thermodynamics diagram, the construction of a liquid-solid sintering system and the regulation of plasma sparkling kinetics. The SDF-PEO coating exhibited a homogeneous and dense microstructure, superior corrosion resistance and good technological adaptability. This work offers a novel theory to design surface treatment solutions with superior corrosion resistance and promising application prospects.

Key words: Self-densified coating, Plasma electrolytic oxidation, Dissolution-ionization-diffusion-deposition, (DIDD) model, Corrosion resistance, Mg alloys