The Anodic Role of Ni-Containing LPSO Phases During the Microgalvanic Corrosion of Mg{sub 98}Gd{sub 1.5}Ni{sub 0.5} Alloy
Journal Article
·
· Journal of Materials Engineering and Performance
- Xi’an University of Technology, School of Material Science and Engineering (China)
- Chang’an University, School of Material Science and Engineering (China)
- Chuanqing Drilling Engineering Co., Ltd, Changqing Downhole Technology Company (China)
- Zhengzhou University, School of Materials Science and Engineering (China)
In the present study, the corrosion characteristics of cast Mg{sub 98}Gd{sub 1.5}Ni{sub 0.5} alloy with Ni-containing long-period stacking ordered (LPSO) structures were investigated. The results reveal that the Ni-containing LPSO phases were more active than the Mg matrix and preferentially eroded during the immersion process. This behavior indicates that the Ni-containing LPSO phases could have acted as microanodes, in contrast to the cathodic role of the Ni-free LPSO phases in other Mg alloys. Furthermore, the potential difference of approximately 600 mV between the phases accelerated the dissolution rate of the LPSO phase. Corrosion of the Mg matrix also occurred due to the inhomogeneous microstructure of the matrix. The synergetic corrosion between the Ni-containing LPSO phases and the enrichment of Cl{sup −} in the thick corrosion product films dominated the propagation of corrosion, which substantially deteriorated the corrosion resistance and accelerated the corrosion process of the Mg{sub 98}Gd{sub 1.5}Ni{sub 0.5} alloy.
- OSTI ID:
- 22970821
- Journal Information:
- Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 4 Vol. 28; ISSN 1059-9495; ISSN JMEPEG
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of LPSO/α-Mg interfaces on dynamic recrystallization behavior of Mg96.5Gd2.5Zn1 alloy
Strengthening mechanisms, hardening/softening behavior, and microstructure evolution in an LPSO magnesium alloy at elevated temperatures
Formation and characterization of microstructure of as-cast Mg–6Gd–4Y–xZn–0.5Zr (x = 0.3, 0.5 and 0.7 wt.%) alloys
Journal Article
·
Fri Dec 15 04:00:00 UTC 2017
· Materials Characterization
·
OSTI ID:22832942
Strengthening mechanisms, hardening/softening behavior, and microstructure evolution in an LPSO magnesium alloy at elevated temperatures
Journal Article
·
Mon Jun 05 00:00:00 UTC 2023
· Materials Characterization
·
OSTI ID:2423625
Formation and characterization of microstructure of as-cast Mg–6Gd–4Y–xZn–0.5Zr (x = 0.3, 0.5 and 0.7 wt.%) alloys
Journal Article
·
Wed May 15 04:00:00 UTC 2013
· Materials Characterization
·
OSTI ID:22285044