A Study on Corrosion Behaviour of Magnesium Alloys

Abstract:

A biodegradable Mg-4Zn-0.6Zr alloy with different content of strontium (Sr) was prepared and studied for orthopedic applications biomaterials. The effects of Sr on the microstructure and corrosion degradation of the as-cast Mg-4Zn-0.6Zr-xSr (ZK40xSr) alloys were investigated. The optical micrograph (OM) observation, energy-dispersive spectrometer (EDS), X-ray diffractometer (XRD) and immersion test were used. The grain size of Mg-4Zn-0.6Zr alloys was reduced obviously with the addition of Sr. The excess of Sr would lead to grain size increasing and grain boundaries widening. The possible presence of the following constituent phases in the grain boundaries: α-Mg, Mg₁₇Sr₂, MgZn, Zn_xSr_y binary and Mg_xZn_ySr_z ternary phase. The formation of Zn_xSr_y and Mg_xZn_ySr_z phase owed to the larger difference of electronegativity values of Zn and Sr. The immersion tests indicated that the average corrosion rate of the as-cast ZK40xSr alloys increased with the increase of Sr content. It contributed to the micro-galvanic corrosion between the α-Mg with the continuous distribution of grain boundaries precipitates.

• Periodical: Applied Mechanics and Materials (Volume 864)
• Pages: 71-77
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.864.71
• Online since: April 2017
• Authors: Lian Xi Chen, Xiao Jian Wang*, Wei Li
• Keywords: Corrosion Resistance, Magnesium Alloy, Microstructure, Strontium

References

[1] A. K. Nasution, H. Hermawan, Degradable Biomaterials for Temporary Medical Implants, Springer International Publishing, Berlin, Germany, (2016).

[2] H. S. Brar, M. O. Platt, M. Sarntinoranont, P. I. Martin, M. V. Manuel, Magnesium as a biodegradable and bioabsorbable material for medical implants, Jom-J Min. Met. Mat. S. 61(9) (2009) 31-34.

DOI: 10.1007/s11837-009-0129-0

[3] F. Witte, The history of biodegradable magnesium implants: A review, Acta Biomater. 6(5) (2010) 1680-1692.

[4] B. L. Mordike, T. Ebert, Magnesium : Properties — applications — potential, Mater. Sci. Eng. A 302(1) (2001) 37-45.

[5] A. Purnama, H. Hermawan, J. Couet, D. Mantovani, Assessing the biocompatibility of degradable metallic materials: State-of-the-art and focus on the potential of genetic regulation, Acta Biomater. 6(5) (2010) 1800-1807.

DOI: 10.1016/j.actbio.2010.02.027

[6] S. Farè, Q. Ge, M. Vedani, G. Vimercati, D. Gastaldi, F. Migliavacca, L. Petrini, S. Trasatti, Evaluation of material properties and design requirements for biodegradable magnesium stents, Matéria 15(2) (2010) 96-103.

DOI: 10.1590/s1517-70762010000200002

[7] N. T. Kirkland, J. Lespagnol, N. Birbilis, M. P. Staiger, A survey of bio-corrosion rates of magnesium alloys, Corros. Sci. 52(2) (2009) 287-291.

DOI: 10.1016/j.corsci.2009.09.033

[8] Y. Chen, Z. Xu, C. Smith, J. Sankar, Recent advances on the development of magnesium alloys for biodegradable implants, Acta Biomater. 10(11) (2014) 4561-4573.

DOI: 10.1016/j.actbio.2014.07.005

[9] Y. F. Zheng, X. N. Gu, F. Witte, Biodegradable metals, Mater. Sci. Eng., R 77 (2014) 1-34.

[10] D. Hong, P. Saha, D. T. Chou, B. Lee, B. E. Collins, Z. Tan, Z. Dong, P. N. Kumta, In vitro degradation and cytotoxicity response of Mg–4% Zn–0. 5% Zr (ZK40) alloy as a potential biodegradable material, Acta Biomater. 9(10) (2013) 8534-8547.

DOI: 10.1016/j.actbio.2013.07.001

[11] W. Zhang, Y. Shen, H. Pan, K. Lin, X. Liu, B. W. Darvell, W. W. Lu, C. Jiang, L. Deng, D. Wang, Effects of strontium in modified biomaterials, Acta Biomater. 7(2) (2011) 800-808.

DOI: 10.1016/j.actbio.2010.08.031

[12] P. J. Marie, Strontium ranelate: a physiological approach for optimizing bone formation and resorption, Bone 38 (2 Suppl 1) (2006) 10-14.

DOI: 10.1016/j.bone.2005.07.029

[13] A. Oyane, K. Onuma, A. Ito, H. M. Kim, T. Kokubo, T. Nakamura, Formation and growth of clusters in conventional and new kinds of simulated body fluids, J Biomed. Mater. Res. A 64(2) (2003) 339-348.

DOI: 10.1002/jbm.a.10426

[14] N. N. Aung, W. Zhou, Effect of grain size and twins on corrosion behaviour of AZ31B magnesium alloy, Corros. Sci. 52(2) (2010) 589-594.

DOI: 10.1016/j.corsci.2009.10.018

[15] Z. Shi, J. Hofstetter, F. Cao, P. J. Uggowitzer, M. S. Dargusch, A. Atrens, Corrosion and stress corrosion cracking of ultra-high-purity Mg5Zn, Corros. Sci. 93 (2015) 330-335.

DOI: 10.1016/j.corsci.2015.01.032

[16] ASTM International, Standard test methods for determining average grain size E110-96e3, West Conshohocken, USA, (2004).

[17] E. F. Emley, Principles of Magnesium technology, Pergamon Press, Oxford, UK, (1966).

[18] M. Qian, D. H. Stjohn, M. T. Frost, Effect of Soluble and Insoluble Zirconium on the Grain Refinement of Magnesium Alloys, Mater. Sci. Forum 419-422 (2003) 593-598.

DOI: 10.4028/www.scientific.net/msf.419-422.593

[19] H. Li, Q. Peng, X. Li, K. Li, Z. Han, D. Fang, Microstructures, mechanical and cytocompatibility of degradable Mg–Zn based orthopedic biomaterials, Mater. Des. 58 (2014) 43-51.

DOI: 10.1016/j.matdes.2014.01.031

[20] M. Masoumi, M. Pekguleryuz, The influence of Sr on the microstructure and texture evolution of rolled Mg–1%Zn alloy, Mater. Sci. Eng. A 529 (2011) 207-214.

DOI: 10.1016/j.msea.2011.09.019

[21] Y. C. Lee, A. K. Dahle, D. H. Stjohn, The role of solute in grain refinement of magnesium, Metall. Mater. Trans. A 31(11) (2000) 2895-2906.

DOI: 10.1007/bf02830349

[22] X. N. Gu, X. H. Xie, N. Li, Y. F. Zheng, L. Qin, In vitro and in vivo studies on a Mg–Sr binary alloy system developed as a new kind of biodegradable metal, Acta Biomater. 8(6) (2012) 2360-2374.

DOI: 10.1016/j.actbio.2012.02.018

[23] Y. Ding, Y. Li, C. Wen, Effects of Mg17Sr2 Phase on the Bio-Corrosion Behavior of Mg–Zr–Sr Alloys, Adv. Eng. Mater. 18(2) (2016) 259-268.

DOI: 10.1002/adem.201500222

[24] R. G. Guan, A. F. Cipriano, Z. Y. Zhao, J. Lock, T. Di, T. Zhao, T. Cui, H. Liu, Development and evaluation of a magnesium-zinc-strontium alloy for biomedical applications - Alloy processing, microstructure, mechanical properties, and biodegradation, Mater. Sci. Eng. C 33 (2013).

DOI: 10.1016/j.msec.2013.04.054

[25] M. Bornapour, N. Muja, D. Shum-tim, M. Cerruti, M. Pekguleryuz, Biocompatibility and biodegradability of Mg-Sr alloys: The formation of Sr-substituted hydroxyapatite, Acta Biomater. 9(2) (2013) 5319-5330.

DOI: 10.1016/j.actbio.2012.07.045

[26] H. S. Brar, J. Wong, M. V. Manuel, Investigation of the mechanical and degradation properties of Mg–Sr and Mg–Zn–Sr alloys for use as potential biodegradable implant materials, Mol. Cancer. Ther. 7 (2012) 87-95.

DOI: 10.1016/j.jmbbm.2011.07.018

[27] W. U. Lu, F. S. Pan, M. B. Yang, W. U. Ju-ying, T. T. Liu, As-cast microstructure and Sr-containing phases of AZ31 magnesium alloys with high Sr contents, Trans. Nonferrous Met. Soc. China 21(4) (2011) 784-789.

DOI: 10.1016/s1003-6326(11)60781-4

[28] K. D. Ralston, N. Birbilis, Effect of Grain Size on Corrosion: A Review, Corro. 66(7) (2010) 319-324.

[29] G. B. Hamu, D. Eliezer, L. Wagner, The relation between severe plastic deformation microstructure and corrosion behavior of AZ31 magnesium alloy, J. Alloys Compd. 468(1-2) (2009) 222-229.

DOI: 10.1016/j.jallcom.2008.01.084