Effect of alloyed Ca on the microstructure and corrosion properties of extruded AZ61 Mg alloy

Citation data:

Corrosion Science, ISSN: 0010-938X, Vol: 112, Page: 44-53

Publication Year:
2016
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Citations 5
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Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/20723
DOI:
10.1016/j.corsci.2016.07.011
Author(s):
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 Show More Hide
Publisher(s):
Elsevier BV; PERGAMON-ELSEVIER SCIENCE LTD
Tags:
Chemistry; Chemical Engineering; Materials Science; A. Magnesium; A. Alloy; B. Weight loss; C. Pitting corrosion
article description
Microstructure and corrosion properties of extruded AZ61 Mg alloys with varying Ca contents were investigated. Microstructure of the extruded AZ61 alloy consisted of α-Mg grains and Al 8 Mn 5 particles. Alloying with 0.1–0.5 wt% Ca to the AZ61 alloy resulted in the additional presence of (Mg,Al) 2 Ca particles in the extruded microstructure. In 0.6 M NaCl solution at 25 °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.