Imperial College London
Portrait Picture

ProfessorBaptisteGault

Faculty of Engineering, Department of Materials

Professor of Atomic-Scale Characterization
 
 
 
//

Contact

 

b.gault

 
 
//

Location

 

Royal School of MinesSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Zhao:2024:10.1038/s41467-024-44802-5,
author = {Zhao, H and Yin, Y and Wu, Y and Zhang, S and Mingers, AM and Ponge, D and Gault, B and Rohwerder, M and Raabe, D},
doi = {10.1038/s41467-024-44802-5},
journal = {Nat Commun},
title = {How solute atoms control aqueous corrosion of Al-alloys.},
url = {http://dx.doi.org/10.1038/s41467-024-44802-5},
volume = {15},
year = {2024}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Aluminum alloys play an important role in circular metallurgy due to their good recyclability and 95% energy gain when made from scrap. Their low density and high strength translate linearly to lower greenhouse gas emissions in transportation, and their excellent corrosion resistance enhances product longevity. The durability of Al alloys stems from the dense barrier oxide film strongly bonded to the surface, preventing further degradation. However, despite decades of research, the individual elemental reactions and their influence on the nanoscale characteristics of the oxide film during corrosion in multicomponent Al alloys remain unresolved questions. Here, we build up a direct correlation between the near-atomistic picture of the corrosion oxide film and the solute reactivity in the aqueous corrosion of a high-strength Al-Zn-Mg-Cu alloy. We reveal the formation of nanocrystalline Al oxide and highlight the solute partitioning between the oxide and the matrix and segregation to the internal interface. The sharp decrease in partitioning content of Mg in the peak-aged alloy emphasizes the impact of heat treatment on the oxide stability and corrosion kinetics. Through H isotopic labelling with deuterium, we provide direct evidence that the oxide acts as a trap for this element, pointing at the essential role of the Al oxide might act as a kinetic barrier in preventing H embrittlement. Our findings advance the mechanistic understanding of further improving the stability of Al oxide, guiding the design of corrosion-resistant alloys for potential applications.
AU  - Zhao,H
AU  - Yin,Y
AU  - Wu,Y
AU  - Zhang,S
AU  - Mingers,AM
AU  - Ponge,D
AU  - Gault,B
AU  - Rohwerder,M
AU  - Raabe,D
DO  - 10.1038/s41467-024-44802-5
PY  - 2024///
TI  - How solute atoms control aqueous corrosion of Al-alloys.
T2  - Nat Commun
UR  - http://dx.doi.org/10.1038/s41467-024-44802-5
UR  - https://www.ncbi.nlm.nih.gov/pubmed/38228660
VL  - 15
ER  -
Download