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Effects of grain size on the corrosion resistance of wrought magnesium alloys containing neodymium |
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| Affiliation: | 1. Department of Mechanical Engineering, Rajiv Gandhi University of Knowledge Technologies (AP-IIIT), Nuzvid 521202, India;2. Department of Mechanical Engineering, Vignana Bharathi Institute of Technology, Hyderabad 501301, India;3. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600036, India |
| Abstract: | A range of grain size from 70 μm to 0.7 μm was studied for corrosion resistance of Mg–Y–RE magnesium alloy using electrochemical and constant immersion testing in 3.5 wt.% NaCl solution. The linear polarization resistance (Rp) showed a clear trend of increasing Rp value with grain refinement. The ultrafine grained sample showed the most positive pitting potential as compared to coarse grained samples. One order of magnitude decrease in corrosion rate was observed between coarsest and ultrafine grained microstructure. |
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