Journal
CORROSION
Volume 78, Issue 4, Pages 350-358Publisher
NATL ASSOC CORROSION ENG
DOI: 10.5006/3934
Keywords
corrosion morphology; magnesium; x-ray computed microtomography
Funding
- National Natural Science Foundation of China [52073030]
- National Natural Science Foundation of China-Guangxi Joint Fund [U20A20276]
Ask authors/readers for more resources
X-ray computed microtomography was used to investigate the corrosion process of extruded pure magnesium. The study observed microscopic corrosion morphologies on the extruded pure Mg surface with corrosion time, and examined the effects of grain size and orientation on corrosion rate. It was found that corrosion tends to form on grain boundaries and manifests as dendritic corrosion cracks along the extrusion direction.
X-ray computed microtomography was used to investigate the corrosion process of the extruded pure magnesium (Mg). The microscopic corrosion morphologies on the extruded pure Mg surface with corrosion time were observed by three-dimensional reconstruction technology. The effects of grain size and grain orientation of the extruded pure Mg on the corrosion rate were studied by the electron backscattered diffraction and first-principles calculations. It is found that the corrosion on the extruded pure Mg surface prefers to form on the grain boundary and the corrosion morphology is mainly the corrosion cracks distributed in a dendritic bifurcation state along the extrusion direction. Interestingly, these dendritic corrosion cracks are connected with the corrosion pits within the surface. The corrosion resistance of extruded pure Mg is improved slightly due to the presence of many high-energy sites at the grain boundaries that promote corrosion.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available