EFFECT OF Sn ON CORROSION PROPERTIES OF HOMOGENIZED Mg-6Zn-0.25Ca MAGNESIUM ALLOY
Keywords:
Mg-Zn alloy, homogenization, CaMgSn phase, corrosion properties
Abstract
Effect of Sn on the corrosion properties of a homogenized Mg-6Zn-0.25Ca alloy was investigated. The corrosion resistance of ZX60 and ZXT601 alloys was analyzed using XRD, metallography, SEM, mass loss, hydrogen evolution, electrochemical polarization curve and impedance spectrum. The results indicate that Mg-6Zn-Sn-0.25Ca alloy is mainly composed of CaMgSn and MgZn2 phases. After an addition of Sn, the grains are significantly refined, and the volume fraction of the second phase with disperse distribution increases. MgZn2 phase precipitates as well. The addition of Sn can significantly improve the corrosion resistance of Mg-6Zn-0.25Ca alloy, which is mainly due to the smaller grain size, as well as uniformly and densely distributed CaMgSn phase of ZXT601 alloy. Therefore, the passive film formed in the corrosion process is more uniform. The corrosion resistance of ZXT601 alloy is much higher than that of ZX60 alloy.
References
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[2] Zeng Z R, Zhu Y M, Bian M Z et al. Annealing strengthening in a dilute Mg– Zn–Ca sheet alloy[J]. Scr. Mater. 2015, 107: 127-130.
[3] Tu T, Chen X-H, Chen J et al. A High-Ductility Mg–Zn–Ca Magnesium Alloy[J]. Acta Metall. Sin-Engl 2019, 32: 23-30.
[4] Esmaily M, Svensson J E, Fajardo S et al. Fundamentals and advances in magnesium alloy corrosion[J]. Prog. Mater Sci. 2017, 89: 92-193.
[5] Atrens A, Shi Z M, Mehreen S U et al. Review of Mg alloy corrosion rates[J]. J. Magnes. Alloy. 2020, 8: 989-998.
[6] Jeong Y S, Kim W J. Enhancement of mechanical properties and corrosion resistance of Mg-Ca alloys through microstructural refinement by indirect extrusion[J]. Corros. Sci. 2014, 82: 392-403.
[7] Jin Y M, Blawert C, Feyerabend F et al. Time-sequential corrosion behavior observation of micro-alloyed Mg-0.5Zn-0.2Ca alloy via a quasi-in situ approach[J]. Corros. Sci. 2019, 158.
[8] Bratsch S G. Standard Electrode Potentials and Temperature Coefficients in Water at 298.15 K[J]. J. Phys. Chem. Ref. Data 1989, 18: 1-21.
[9] Pan Hucheng, Qin Gaowu, Xu Ming et al. Enhancing mechanical properties of Mg–Sn alloys by combining addition of Ca and Zn. Materials & Design[J], 2015, 83: 736.
[10] Suresh K, Rao K P, Prasad Y V, et al. Microstructure and mechanical properties of as-cast Mg-Sn-Ca alloys and effect of alloying elements [J]. Transactions of Nonferrous Metals Society of China, 2013, 23(12): 3604-3610.
[11] Arun Boby, Srinivasan A, Pillai U T S et al. Mechanical characterization and corrosion behavior of newly designed Sn and Y added AZ91 alloy. Materials & Design[J], 2015, 88: 871.
[12] Zhao C, Pan F, Zhao S et al. Microstructure, corrosion behavior and cytotoxicity of biodegradable Mg–Sn implant alloys prepared by sub-rapid solidification[J]. Mater. Sci. Eng. C 2015, 54: 245-251.
[13] Wei S, Zhu T, Hodgson M et al. Effects of Sn addition on the microstructure and mechanical properties of as-cast, rolled and annealed Mg–4Zn alloys[J]. Mater. Sci. Eng. A 2013, 585: 139-148.
[14] Metalnikov P, Ben-Hamu G, Eliezer D et al. Role of Sn in microstructure and corrosion behavior of new wrought Mg-5Al alloy[J]. J. Alloys Compd. 2019, 777: 835-849.
[15] Takeuchi A, Inoue A. Classification of bulk metallic glasses by atomic size difference, heat of mixing and period of constituent elements and its application to characterization of the main alloying element[J]. Mater. Trans. 2005, 46: 2817-2829.
[16] Wang C, Liu Z, Xiao S et al. Effects of Sn, Ca additions on thermal conductivity of Mg matrix alloys[J]. Mater. Sci. Technol. 2016, 32: 581-587.
[17] Kozlov A, Ohno M, Arroyave R et al. Phase equilibria, thermodynamics and solidification microstructures of Mg–Sn–Ca alloys, Part 1: Experimental investigation and thermodynamic modeling of the ternary Mg–Sn–Ca system[J]. Intermetallics 2008, 16: 299-315.
[18] Pan H C, Qin G W, Huang Y M et al. Development of low-alloyed and rare-earth-free magnesium alloys having ultra-high strength[J]. Acta Mater. 2018, 149: 350-363.
[19] Zhang A, Kang R, Wu L et al. A new rare-earth-free Mg-Sn-Ca-Mn wrought alloy with ultra-high strength and good ductility[J]. Mater. Sci. Eng. A 2019, 754: 269-274.
[20] Wang C, Guo S, Zeng L, et al. Effects of second phases on microstructure, microhardness, and corrosion behavior of Mg-3Sn-(1Ca) alloys [J]. Materials (Basel), 2019, 12(16):2515.
[21] Gong Changwei, He Xinze, Yan Xue. Corrosion behavior of Mg–Ca–Zn alloys with high Zn content. Journal of Physics and Chemistry of Solids[J], 2021, 152: 1.
[22] Wang xuejian. Study on corrosion behavior of Mg-5Sn(-In-Ga) alloys [D]. Dalian University of Technology, 2022.
[23] Hu Tong, Xiao Wenlong, Wang Fang et al. Improving tensile properties of Mg-Sn-Zn magnesium alloy sheets using pre-tension and ageing treatment. Journal of Alloys and Compounds[J], 2018, 735: 1494.
[24] Jiang Pingli, Carsten Blawert, Jan Bohlen et al. Corrosion performance, corrosion fatigue behavior and mechanical integrity of an extruded Mg4Zn0.2Sn alloy. Journal of Materials Science & Technology[J], 2020, 59: 107.
[25] Jiang Pingli, Carsten Blawert, Nico Scharnagl et al. Mechanistic understanding of the corrosion behavior of Mg4Zn0.2Sn alloys: From the perspective view of microstructure. Corrosion Science[J], 2020, 174: 108 863.
[26] Baek Soomin, Kang Jeongsu, Kim Jongchan et al. Corrosion Science[J], 2018, 141: 203.
[27] Kwon Jaeho, Baek Soomin, Jung Hoseok et al. Role of micro alloyed Sm in enhancing the corrosion resistance of hot-rolled Mg-8Sn-1Al-1Zn alloy. Corrosion Science[J], 2021, 185: 109 425.
[28] Yin Siqi, Duan Wenchao, Liu Wenhong et al. Influence of specific second phases on corrosion behaviors of Mg-Zn-Gd-Zr alloys. Corrosion Science[J], 2020, 166: 108 419.
Published
2025-04-03
How to Cite
1.
Hu Y, Jia Z, Kou R, Zhai Z, Niu X. EFFECT OF Sn ON CORROSION PROPERTIES OF HOMOGENIZED Mg-6Zn-0.25Ca MAGNESIUM ALLOY. MatTech [Internet]. 2025Apr.3 [cited 2026Aug.10];59(2):227–234. Available from: https://mater-tehnol.si/index.php/MatTech/article/view/1335
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