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http://dx.doi.org/10.12656/jksht.2015.28.3.126

Corrosion Behavior of Solution-Treated Mg-8%Al-X%Zn Casting Alloys  

Jun, Joong-Hwan (Advanced Process and Materials R&D Group, Korea Institute of Industrial Technology)
Hwang, In-Je (Advanced Process and Materials R&D Group, Korea Institute of Industrial Technology)
Publication Information
Journal of the Korean Society for Heat Treatment / v.28, no.3, 2015 , pp. 126-133 More about this Journal
Abstract
The aim of this study is to investigate the effect of solution treatment on the corrosion behavior of Mg-8%Al-(0-1)%Zn casting alloys in 1M NaCl aqueous solution. After the solution treatment, all alloys showed single ${\alpha}$-(Mg) phase microstructure by dissolution of ${\beta}(Mg_{17}Al_{12})$ phase into the ${\alpha}$-(Mg) matrix. The $H_2$ evolution volume decreased with an increase in Zn content, which indicates that the addition of Zn plays a beneficial role in decreasing corrosion rate of the Mg-Al-Zn alloy in solution-treated state. The microstructural evaluations on the corrosion products and corroded surfaces after the immersion test in 1 M NaCl solution revealed that the incorporation of more $Al_2O_3$ and ZnO into the corrosion product, by which the penetration of $Cl^-$ ions is impeded, are thought to be responsible for the better corrosion resistance in relation with the Zn addition.
Keywords
Mg-Al-Zn alloy; Microstructure; Corrosion properties; solution treatment;
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1 B. L. Mordike and T. Ebert : Mater. Sci. Eng. A, 302 (2001) 37.   DOI
2 G. Song and A. Atrens : Adv. Eng. Mater., 5 (2003) 837.   DOI
3 A. K. Dahle, Y. C. Lee, M. D. Nave, P. L. Schaffer and D. H. StJohn : J. Light Met., 1 (2001) 61.   DOI
4 D. D. Luong, V. C. Shunmugasamy, J. Cox, N. Gupta and P. K. Rohatgi : JOM, 66 (2014) 312.   DOI
5 D. Sachdava : Corros. Sci., 60 (2012) 18.   DOI
6 M. M. Avedesian and H. Baker : "Magnesium and Magnesium Alloys", ASM Specialty Handbook, ASM International, Materials Park, OH, p. 15.
7 I. J. Hwang, J. H. Moon, J. H. Jun and Y. J. Kim : J. Kor. Foundry Soc., 35 (2015) 248.
8 G. M. Han, Z. Q. Han, A. A. Luo and B. C. Liu : J. Alloys Compd., 641 (2015) 56.   DOI
9 I. A. Yakubtsov, B. J. Diak, C. A. Sager, B. Bhattacharya, W. D. MacDonald and M. Niewczas : Mater. Sci. Eng. A, 496 (2008) 247.   DOI
10 Y. S. Wang, Q. D. Wang, G. H. Wu, Y. P. Zhu and W. J. Ding : Mater. Lett., 57 (2002) 929.   DOI
11 Y. S. Wang, Q. D. Wang, C. J. Ma, W. J. Ding and Y. P. Zhu : Mater. Sci. Eng. A, 342 (2003) 178.   DOI
12 Y. W. Song, E. H. Han, D. Shan, C. H. Yim and B. S. You : Corros. Sci., 65 (2012) 322.   DOI
13 S. Izumi, M. Yamasaki and Y. Kawamura : Corros. Sci., 51 (2009) 395.   DOI
14 Y. W. Song, E. H. Han, K. H. Dong, D. Y. Shan, C. H. Yim and B. S. You : Corros. Sci., 88 (2014) 215.   DOI
15 M. S. Kim : J. Corros. Sci. Soc. Kor., 1 (1980) 24.
16 N. B. Pilling and R. E. Bedworth : J. Inst. Met., 29 (1923) 529.
17 J. T. Kim, H. S. Jeong, S. S. Ryu, G. D. Lee and J. M. Park : Kor. Chem. Eng. Res., 49 (2011) 745.   DOI