In Vitro Corrosion Study of Friction Stir Processed WE43 Magnesium Alloy in a Simulated Body Fluid
Abstract
:1. Introduction
2. Results
2.1. Microstructure
2.2. Corrosion Behavior
2.2.1. Electrochemical Corrosion Test
2.2.2. Immersion Corrosion Test
2.2.3. Corrosion Morphology
2.3. Tensile Test
2.3.1. Tensile Properties
2.3.2. Fracture Morphology
3. Discussion
3.1. Influence of Grain Refinement on Uniform Corrosion Behavior
3.2. Influence of Second Phases on Uniform Corrosion Behavior
4. Materials and Methods
5. Conclusions
- The Ecorr and icorr values obtained by electrochemical measurements indicate that the corrosion resistance of as-cast WE43 alloy is improved after FSP. In addition, according to immersion tests, the corrosion rate of as-cast WE43 alloy is decreased from 38.41 mm/yr to 15.12 mm/yr after FSP.
- Micro-galvanic corrosion is the dominant corrosion behavior for BM and FSP specimens. Due to the fine-grained and homogeneous microstructure, the uniform corrosion morphology was observed on FSP WE43 alloy.
- After immersion in SBF for five days, the maximum tensile load for as-cast WE43 alloy is significantly decreased to 20% of the original value, while the maximum tensile load of the FSP specimen is still 54% of the original value, which is attributed to the improved corrosion resistance and uniform corrosion behavior after FSP.
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Mg | Y | Nd | Zr | Al | Ni | Si | Ca | Zn |
---|---|---|---|---|---|---|---|---|
Bal. | 4.27 | 2.94 | 0.51 | 0.07 | 0.05 | 0.05 | 0.04 | 0.01 |
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Cao, G.; Zhang, D.; Zhang, W.; Zhang, W. In Vitro Corrosion Study of Friction Stir Processed WE43 Magnesium Alloy in a Simulated Body Fluid. Materials 2016, 9, 542. https://doi.org/10.3390/ma9070542
Cao G, Zhang D, Zhang W, Zhang W. In Vitro Corrosion Study of Friction Stir Processed WE43 Magnesium Alloy in a Simulated Body Fluid. Materials. 2016; 9(7):542. https://doi.org/10.3390/ma9070542
Chicago/Turabian StyleCao, Genghua, Datong Zhang, Weiwen Zhang, and Wen Zhang. 2016. "In Vitro Corrosion Study of Friction Stir Processed WE43 Magnesium Alloy in a Simulated Body Fluid" Materials 9, no. 7: 542. https://doi.org/10.3390/ma9070542