Study on Corrosion Property of Fluoride Treated Biodegradable AZ31 Magnesium Alloy

Abstract:

In order to improve the corrosion resistance of Mg alloys as degradable implant material, fluorine conversion coatings were synthesized on AZ31 magnesium alloy by immersion in hydrofluoric acid (HF) for different time. Potentiodynamic electrochemical technique and hydrogen evolution testing were employed to investigate the corrosion behavior of the coated alloys in Hanks solution. It is indicated that the fluoride conversion coating, which is compact and composed of MgF₂, can significantly decrease the degradation rate of Mg alloy AZ31 in Hanks solution. The most improved corrosion protection was achieved by immersion for 10 days. The corrosion current density was 40 times lower than that of the substrate and the hydrogen evolution rate of the coated sample was only one-fiftieth of the substrate.

• Periodical: Advanced Materials Research (Volumes 750-752)
• Pages: 1669-1673
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.750-752.1669
• Online since: August 2013
• Authors: Chun Yan Zhang, Yan Long Ma, Cheng Long Liu
• Keywords: Biomaterial, Corrosion, Magnesium Alloy, Surface Treatment

References

[1] P. S. Mark, M. P. Alexis, A. H. Jerawal and D. George: Biomaterials vol. 27(2006), pp.1728-1734.

[2] F. Witte, N. Hort, C. Vogt and S. Cohen: Current Opinion in Solid State and Materials Science vol. 12(2008), p.63–72.

[3] D.C. Xue, Y.H. Yun, Z.Q. Tan, Z.Y. Dong and M.J. Schulz: Journal of Materials Science & Technology vol. 28(2012), pp.261-267.

[4] F. Tamimi, D. L. Nihouannen, D. C. Bassett, S. Ibasco and U. Gbureck: Acta Biomaterialia vol. 7(2011), pp.2678-2685.

DOI: 10.1016/j.actbio.2011.02.007

[5] R. C. Zeng, W. Dietzel, F. Witte, N. Hort and C. Blawert: Adv Eng Mater vol. 10 (2008), p. B03-B14.

DOI: 10.1002/adem.200800035

[6] Y.S. Hong, K. Yang, G. D. Zhang, J. J. Huang, Y. H. Hao and H. J. Ai: Acta Metallurgical Sinica vol. 44 (2008) , pp.1035-1041.

[7] X. K. Liu, Z. L. Liu, P. Liu and Y. H. Xiang, W. B. Hu and W.J. Ding: Transactions of Nonferrous Metals Society of China vol. 20(2010), pp.2185-2191.

DOI: 10.1016/s1003-6326(09)60440-4

[8] J. E. Gray and B. Luan: J. Journal of Alloys and Compounds vol. 336 (2002), pp.88-92.

[9] F. Witte, J. Fischer, J. Nellesen, C. Vogt, J. Vogt, T. Donath and F. Beckmann: Acta Biomaterial vol. 6 (2010), p.1792–1799.

DOI: 10.1016/j.actbio.2009.10.012

[10] H. Y. Jiang: Study of compatibility for fluoride treated biodegradable AZ31B magnesium alloys. Master degree thesis, China medical university (2009).

[11] T.T. Yan, L.L. Tan, D. S Xiong and X.J. Liu: Materials Science and Engineering C. vol. 30 (2010), p.740–74.

[12] G. L. Song and A. Atrens: Adv. Eng. Mater. vol. 12 (2003), p.837–858.