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- Park, Sung Soo
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Role of microalloyed Sm in enhancing the corrosion resistance of hot-rolled Mg–8Sn–1Al–1Zn alloy
- Author(s)
- Kwon, Jaeho, Baek, Soo-Min, Jung, Hoseok, Kim, Jong Chan, Lee, Si-Young, Park, Sung Soo
- Issued Date
- 2021-06
- Citation
- CORROSION SCIENCE, v.185, pp.109425
- Abstract
- We report that the corrosion resistance of hot-rolled Mg?8Sn?1Al?1Zn alloy was significantly enhanced by Sm microalloying. Corrosion rates, measured after immersion for 72 h in 0.6 M NaCl solution, were found to be 2.7 and 19 mm y-1 for the alloys with and without an addition of 0.02 wt% Sm, respectively. Electrochemical and microstructural analyses revealed that the enhanced corrosion resistance achieved by Sm microalloying is mainly a result of a reduced H2 evolution rate owing to the presence of Al8Fe4Sm particles instead of nobler Al5Fe2 particles, which highly accelerate microgalvanic corrosion in the alloy without Sm microalloying.
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- ISSN
- 0010-938X
- Keyword (Author)
- Mg alloy, Microalloying, Phase, Volta potential, Microgalvanic corrosion
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