Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of Sn Addition on Corrosion Behavior of Mg-4%Zn Casting Alloy

Mg-4%Zn 주조 합금의 부식 거동에 미치는 Sn 첨가의 영향

  • Han, Jin-Gu (Advanced Process and Materials R&D Group, Korea Institute of Industrial Technology) ;
  • Jun, Joong-Hwan (Advanced Process and Materials R&D Group, Korea Institute of Industrial Technology)
  • 한진구 (한국생산기술연구원 융합공정소재그룹) ;
  • 전중환 (한국생산기술연구원 융합공정소재그룹)
  • Received : 2017.03.02
  • Accepted : 2017.05.02
  • Published : 2017.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

In the present study, effects of an addition of Sn on the microstructure and corrosion behavior were investigated in Mg-4%Zn-(0-3)%Sn casting alloys. With an increase in the Sn content, the ${\alpha}-(Mg)$ dendritic cell size was reduced, whereas the total amount of precipitates increased due to the formation of the $Mg_2Sn$ phase. It was found in immersion and electrochemical corrosion tests that the addition of Sn has a detrimental effect on the corrosion resistance of the Mg-4%Zn alloy. Microstructural examinations of the corrosion product and the corroded surface indicated that an accelerated micro-galvanic effect by the $Mg_2Sn-phase$ particles and a less protective corrosion product on the surface were responsible for the increased corrosion rate at a higher Sn content.

Keywords

References

  1. Mordike BL and Ebert T, Mater. Sci. Eng. A, "Magnesium: Properties-Applications-Potential", 302 (2001) 37-45. https://doi.org/10.1016/S0921-5093(00)01351-4
  2. Friedrich H and Schumann S, J. Mater. Proc. Tech., "Research for 'A New Age of Magnesium' in the Automotive Industry", 117 (2001) 276-281. https://doi.org/10.1016/S0924-0136(01)00780-4
  3. Luo AA, Inter. Mater. Rev., "Recent magnesium alloy development for elevated temperature applications", 49 (2004) 13-30. https://doi.org/10.1179/095066004225010497
  4. Eliezer D, Aghion E and Froes FH, Adv. Perform. Mater., "Magnesium science, technology and applications", 5 (1998) 201-212. https://doi.org/10.1023/A:1008682415141
  5. Song GL and Atrens A, Adv. Eng. Mater., "Understanding magnesium corrosion : A framework for improved alloy performance", 5 (2003) 837-858. https://doi.org/10.1002/adem.200310405
  6. Koc E, Kannan MB, Unal M and Candan E, J. Alloys Compd., "Influence of zinc on the microstructure, mechanical properties and in vitro corrosion behavior of magnesium-zinc binary alloys", 648 (2015) 291-296. https://doi.org/10.1016/j.jallcom.2015.06.227
  7. Cai S, Lei T, Li N and Feng F, Mater. Sci. Eng. C, "Effects of Zn on microstructure, mechanical properties and corrosion behavior of Mg-Zn alloys", 32 (2012) 2570-2577. https://doi.org/10.1016/j.msec.2012.07.042
  8. Chunming W, Yungui C, Sufen X, Wucheng D and Xia L, Rare Met. Mater. Eng., "Thermal conductivity and mechanical properties of as-cast Mg-3Zn-(0.5-3.5)Sn alloys", 42 (2013) 2019-2022. https://doi.org/10.1016/S1875-5372(14)60018-7
  9. Wei S, Zhu T, Hodgson M and Gao W, Mater. Sci. Eng. A, "Effects of Sn addition on the microstructure and mechanical properties of as-cast, rolled and annealed Mg-4Zn alloys", 585 (2013) 139-148. https://doi.org/10.1016/j.msea.2013.07.051
  10. Qi F, Zhang D, Zhang X and Xu X, J. Alloys Compd., "Effect of Sn addition on the microstructure and mechanical properties of Mg-6Zn-1Mn (wt.%) alloy", 585 (2014) 656-666. https://doi.org/10.1016/j.jallcom.2013.09.156
  11. Chen J, Chen Z, Yan H, Zhang F and Liao K, J. Alloys Compd., "Effects of Sn addition on microstructure and mechanical properties of Mg-Zn-Al alloys", 461 (2008) 209- 215. https://doi.org/10.1016/j.jallcom.2007.07.066
  12. Mendis CL, Bettles CJ, Gibson MA and Hutchinson CR, Mater. Sci. Eng. A, "An enhanced age hardening response in Mg-Sn based alloys containing Zn", 435-436 (2006) 163-171. https://doi.org/10.1016/j.msea.2006.07.090
  13. Zhao MC, Schmutz P, Brunner S, Liu M, Song GL and Atrens A, Corros. Sci., "An exploratory study of the corrosion of Mg alloys during interrupted salt spray testing", 51 (2009) 1277-1292. https://doi.org/10.1016/j.corsci.2009.03.014
  14. Shi Z, Liu M and Atrens A, Corros. Sci., "Measurement of the corrosion rate of magnesium alloys using Tafel extrapolation", 52 (2010) 579-588. https://doi.org/10.1016/j.corsci.2009.10.016
  15. Gao X and Nie JF, Scripta Mater., "Structure and thermal stability of primary intermetallic particles in an Mg-Zn casting alloy", 57 (2007) 655-658. https://doi.org/10.1016/j.scriptamat.2007.06.005
  16. Sasaki TT, Oh-ishi K, Ohkubo T and Hono K, Mater. Sci. Eng. A, "Effect of double aging and microalloying on the age hardening behavior of a Mg-Sn-Zn alloy", 530 (2011) 1-8. https://doi.org/10.1016/j.msea.2010.05.010
  17. Lee WJ and Pyun SI, J. Corros. Sci. Soc. Kor., "Fundamentals and applications of electrochemical impedance spectroscopy to corrosion sciences", 26 (1997) 120-140.
  18. Tsao CH and Mansfeld F, Corros., "Determination of coating deterioration with EIS : Part II. Development of a method for field testing of protective coatings", 49 (1993) 726-737. https://doi.org/10.5006/1.3316106
  19. Song Y, Han EH, Shan D. Yim CD and You BS, Corros. Sci., "The effect of Zn concentration on the corrosion behavior of Mg-xZn alloys", 65 (2012) 322-330. https://doi.org/10.1016/j.corsci.2012.08.037
  20. Ambat R, Aung NN and Zhou W, J. Appl. Electrochem., "Studies on the influence of chloride ion and pH on the corrosion and electrochemical behavior of AZ91D magnesium alloy", 30 (2000) 865-874. https://doi.org/10.1023/A:1004011916609