Turning a native or corroded Mg alloy surface into an anti-corrosion coating in excited CO2
Name
s41467-018-06433-5.pdf
Size
1.81 MB
Format
Adobe PDF
Checksum (MD5)
346cbca5405ee69c2effd45ca72ba233
Author(s)
Wang, Yuecun
Liu, Boyu
Zhao, Xin’ai
Zhang, Xionghu
Miao, Yucong
Yang, Nan
Yang, Bo
Zhang, Liqiang
Kuang, Wenjun
Li, Ju
Date Issued
October 2018
Journal
Nature Communications
Publisher
Nature Publishing Group
Citation
Wang, Yuecun, Boyu Liu, Xin’ai Zhao, Xionghu Zhang, Yucong Miao, Nan Yang, Bo Yang, et al. “Turning a Native or Corroded Mg Alloy Surface into an Anti-Corrosion Coating in Excited CO2.” Nature Communications 9, no. 1 (October 3, 2018).
Version
Final published version
Abstract
Despite their energy-efficient merits as promising light-weight structural materials, magnesium (Mg) based alloys suffer from inadequate corrosion resistance. One primary reason is that the native surface film on Mg formed in air mainly consists of Mg(OH)2 and MgO, which is porous and unprotective, especially in humid environments. Here, we demonstrate an environmentally benign method to grow a protective film on the surface of Mg/Mg alloy samples at room temperature, via a direct reaction of already-existing surface film with excited CO2. Moreover, for samples that have been corroded obviously on surface, the corrosion products can be converted directly to create a new protective surface. Mechanical tests show that compared with untreated samples, the protective layer can elevate the yield stress, suppress plastic instability and prolong compressive strains without peeling off from the metal surface. This environmentally friendly surface treatment method is promising to protect Mg alloys, including those already-corroded on the surface.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/s41467-018-06433-5
