| Abstract |
The corrosion behavior of soluble Mg–Gd-based alloys was systematically investigated by analyzing two key aspects: environmental factors and microstructural characteristics. Environmental influences were evaluated using immersion weight loss tests under varying Cl− concentrations and temperature conditions. From a microstructural perspective, the study examined the impact of different initial microstructural morphologies on corrosion performance. The second-phase compound Mg5Gd, formed in alloys prepared via melting, was subjected to both immersion weight loss and electrochemical testing. The results demonstrated that corrosion rates increased with higher Cl− concentrations and elevated temperatures, albeit in a nonlinear manner. Notably, significant effects on corrosion rates were observed in the Cl−concentration range of 1% to 3% and at temperatures between 75 °C and 100 °C. Additionally, the dissolution rate of the alloy increased markedly from 8.37 mg/cm2/h in the as-cast state to 43.85 mg/cm2/h following extrusion combined with perforation deformation. Microstructural analysis revealed that the extrusion process disrupted the coarse, reticulated second-phase structure observed in the as-cast state, thereby diminishing its corrosion-inhibiting properties. Electrochemical testing further confirmed that the Mg5Gd second phase, formed through the incorporation of the rare-earth element Gd, exhibited high electrochemical activity. |
| Authors |
Qinghua Wang  , Zhiquan Huang , Yanchun Zhu , Ling Qin  , Jingfeng Zou , Lifeng Ma
|
| Journal Info |
Multidisciplinary Digital Publishing Institute | Metals , vol: 15
, iss: 1
, pages: 35 - 35
|
| Publication Date |
1/3/2025 |
| ISSN |
2075-4701 |
Type |
article |
| Open Access |
gold
|
| DOI |
https://doi.org/10.3390/met15010035 |
| Keywords |
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