Microstructure and corrosion resistance of ultrahigh pressure Mg-8Li based alloys.

Yang, Meng; Feng, Jiawen; Hu, Haidong; Niu, Tingting; Gao, Wei; Zou, Guodong; Fernandez, Carlos; Ren, Liqun; Peng, Qiuming

Abstract

High anti-corrosion Mg alloys is desirable to expand their industrial applications. Herein we report an outstanding corrosion resistance of dual-phase Mg-8Li-Y alloy using ultrahigh pressure (UHP) technology. The average corrosion rate is ~0.47 mm/y, overwhelming the majority of Mg-Li alloys reported hitherto. In-situ X-ray diffraction and scanning electron microscope observation demonstrate that a unique multiple-film on UHPed Mg-8Li-Y alloy attributes to the excellent corrosion resistance, which origins from the dynamic dissolution/regeneration of Li2CO3-rich composite film, thus effectively prohibiting corrosion solution permeation. These results provide some implications to design good anti-corrosion coating for Mg, ever stainless Mg alloys.

Citation

YANG, M., FENG, J., HU, H., NIU, T., GAO, W., ZOU, G., FERNANDEZ, C., REN, L. and PENG, Q. 2023. Microstructure and corrosion resistance of ultrahigh pressure Mg-8Li based alloys. Journal of alloys and compounds [online], 966, article ID 171543. Available from: https://doi.org/10.1016/j.jallcom.2023.171543

• Journal Article Type: Article
• Acceptance Date: Jul 26, 2023
• Online Publication Date: Jul 26, 2023
• Publication Date: Dec 5, 2023
• Deposit Date: Jul 31, 2023
• Publicly Available Date: Jul 27, 2024
• Journal: Journal of alloys and compounds
• Print ISSN: 0925-8388
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 966
• Article Number: 171543
• DOI: https://doi.org/10.1016/j.jallcom.2023.171543
• Keywords: Mg-Li alloys; Ultrahigh pressure; Surface films; Corrosion properties
• Public URL: https://rgu-repository.worktribe.com/output/2028739