Journal
MATERIALS
Volume 15, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/ma15051622
Keywords
magnesium; rare earth elements; erosion; weight loss; pitting corrosion
Categories
Funding
- China Postdoctoral Science Foundation [2020M682337]
- Certificate of Postdoctoral Research Grant in Henan Province [201903011]
- National Key Research and Development Program of China [2016YFB0301001, 2016YFB0301101]
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Adjusting the microstructure through deformation process affects the corrosion behavior of Mg alloys. This study investigated the corrosion performance of extruded and forged WE43 alloys in NaCl solution, and found that the different microstructures resulted in different corrosion behaviors and corrosion resistance.
Adjusting the microstructure through the deformation process is one of the ways to improve the properties of Mg alloys. Most studies have focused on the influence of the microstructure after deformation treatment on the mechanical properties of Mg alloys. In this paper, extruded and forged Mg-Gd-Y-Nd-Zr alloys were selected to investigate the corrosion performance of two deformed magnesium alloys immersed in 0.6 M NaCl solution using a hydrogen evolution test, a weight loss test, an immersion experiment, and an electrochemical test. The results showed that WE43 alloys undergoing different deformation treatments presented different microstructures, which led to different corrosion behaviors and corrosion resistance. The extruded WE43 alloy showed uniform corrosion, while the forged WE43 alloy suffered severe local galvanic corrosion. Meanwhile, the corrosion rate of the forged WE43 alloy was about four times faster than that of the extruded WE43 alloy.
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