Effect of alloyed Ca on the microstructure and corrosion properties of extruded AZ61 Mg alloy
- Baek, Soo-Min
- Kim, Hyeon Ju
- Jeong, Hu Young
- Sohn, So-Dam
- Shin, Hyung-Joon
- Choi, Kyung-Jin
- Lee, Ki-Suk
- Lee, Jung Gu
- Yim, Chang Dong
- You, Bong Sun
- Ha, Heon-Young
- Park, Sung Soo
Publication date
November 2016
DOI Publisher
Elsevier BV ISSN
0010-938X Journal
Corrosion Science Citation count (estimate)
2Abstract
Microstructure and corrosion properties of extruded AZ61 Mg alloys with varying Ca contents were investigated. Microstructure of the extruded AZ61 alloy consisted of a-Mg grains and Al8Mn5 particles. Alloying with 0.1-0.5 wt% Ca to the AZ61 alloy resulted in the additional presehce of (Mg,Al)(2)Ca particles in the extruded microstructure. In 0.6 M NaCl solution at 25 degrees C, the extruded AZ61 alloys with 0.1-0.5 wt% Ca showed corrosion rates over 2 times faster than that of the AZ61 alloy without Ca addition. Such deteriorated corrosion resistance due to Ca addition is discussed in terms of passivation and microgalvanic corrosion.clos
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