Competitive anion precipitation governs corrosion product film evolution on corrosion-resistant magnesium alloys in physiological solutions

In solutions containing Cl − as the base electrolyte, adding either H 2 PO 4 − /HPO 4 2− or HCO 3 − markedly lowers the corrosion rates of Mg-Al-Y alloy wires, suppresses severe localized corrosion and promotes more uniform degradation. When both anions are present, their competitive interactions alter early corrosion product evolution and lead to a less continuous and less protective corrosion product film. Thermodynamic calculations indicate that phase accessibility depends on local pH and ion activities, while quasi-in situ FTIR reveals distinct early interfacial evolution of P- and C-containing species. Subsequent product retention may additionally depend on dissolution tendency and interfacial bonding. First-principles calculations further show that, in the selected idealized models, the carbonate-containing interface exhibits a higher Cl − migration barrier, whereas the phosphate-containing interface exhibits stronger interfacial adhesion.

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Publication Details

Journal
Journal of Magnesium and Alloys
Published
2026-10-13
DOI
https://doi.org/10.1016/j.jma.2026.102336
Primary Topic
Magnesium Alloys: Properties and Applications
Type
article
Field-Weighted Citation Impact
0.00

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article

Competitive anion precipitation governs corrosion product film evolution on corrosion-resistant magnesium alloys in physiological solutions

Zishuo Ye, Sihuan Yuan, Shu Xiao, Chao Yang et al.
Journal of Magnesium and Alloys
Magnesium Alloys: Properties and Applications
article

Competitive anion precipitation governs corrosion product film evolution on corrosion-resistant magnesium alloys in physiological solutions

Zishuo Ye, Sihuan Yuan, Shu Xiao, Chao Yang, Yuyang Chen, Yao Yang, Jingya Wang, Tian Xie, Paul K Chu, Zongmin Sun, Hu Zhang, Chao Zhou, Shuliang Zhao, Xiaoqin Zeng, Tao Ying
article en

Abstract

In solutions containing Cl − as the base electrolyte, adding either H 2 PO 4 − /HPO 4 2− or HCO 3 − markedly lowers the corrosion rates of Mg-Al-Y alloy wires, suppresses severe localized corrosion and promotes more uniform degradation. When both anions are present, their competitive interactions alter early corrosion product evolution and lead to a less continuous and less protective corrosion product film. Thermodynamic calculations indicate that phase accessibility depends on local pH and ion activities, while quasi-in situ FTIR reveals distinct early interfacial evolution of P- and C-containing species. Subsequent product retention may additionally depend on dissolution tendency and interfacial bonding. First-principles calculations further show that, in the selected idealized models, the carbonate-containing interface exhibits a higher Cl − migration barrier, whereas the phosphate-containing interface exhibits stronger interfacial adhesion.

Journal of Magnesium and AlloysVol. 27
City University of Hong Kong (HK), Shanghai Jiao Tong University (CN), Renji Hospital (CN), Shanghai Chest Hospital (CN), Yunnan Machinery Research and Design Institute (CN), State Key Laboratory of Oncogene and Related Genes (CN), South China University of Technology (CN)
City University of Hong Kong, National Natural Science Foundation of China, China Postdoctoral Science Foundation
Openalex Percentile: Top 29%
Magnesium Alloys: Properties and Applications
DOIOpen Access PDFOpenAlex
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