Influence of EDTA-2Na Concertration on the Microstructure and Corrosion Behaviors of Mg-Al-Y Alloy

Abstract:

In this paper,the micro-arc oxidation technology were utilized to fabricated the oxidation coating in order to resolve the corrosion resistance of the Mg-Al-Y alloy. The EDTA-2Na solution was introduced into the electrolyte solution for improving the coating corrosion properties.After the micro-arc oxidation process, phase structural, surface morphology and corrosion resistance of the MAO coating of Mg-Al-Y alloy were performed by XRD, SEM and Potentiodynamic polarisation measurements. The introduce of EDTA-2Na in the electrolyte solution improve the positive potential and reduced the corrosion current, which would improve the corrosion resistance properties of the Mg-Al-Y alloy.

• Periodical: Applied Mechanics and Materials (Volumes 727-728)
• Pages: 201-204
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.727-728.201
• Online since: January 2015
• Authors: Yun Long Zhang, Mu Qin Li, Ping Liao, Yu Min Zhang
• Keywords: Corrosion Resistance, EDTA-2Na Solution, Micro-Arc Oxidation

References

[1] Mark P. Staiger,  Alexis M. Pietak, Jerawala Huadmai, et al. Magnesium and its alloys as orthopedic biomaterials: A review [J]. Biomaterials. 2006, Vol. 27(9): 1728–1734.

DOI: 10.1016/j.biomaterials.2005.10.003

[2] Witte F et al. Degradable biomaterials based on magnesium corrosion. Curr Opin Solid State Mater Sci 2008, Vol. 12: 63~72.

[3] Yanhong Gu, Sukumar Bandopadhyay, Cheng-fu Chen, et al. Long-term corrosion inhibition mechanism of microarc oxidation coated AZ31 Mg alloys for biomedical applications[J]. Materials and Design. 2013(46) : 66-75.

DOI: 10.1016/j.matdes.2012.09.056

[4] Jin F, Chu PK, Xu G, Zhao J, Tang D, Tong H. Structure and mechanical properties of magnesium alloy treated by micro-arc discharge oxidation using direct current and high-frequency bipolar pulsing modes [J]. Mater Sci Eng, A. 2006, (435): 123–126.

DOI: 10.1016/j.msea.2006.07.059

[5] Bala Srinivasan P, Blawert C, Dietzel W. Effect of plasma electrolytic oxidation treatment on the corrosion and stress corrosion cracking behaviour of AM50 magnesium alloy[J]. Mater Sci Eng, A 2008(494): 401–406.

DOI: 10.1016/j.msea.2008.04.031

[6] Zhang X, Zhang Y, Chang L, Jiang Z, Yao Z, Liu X. Effects of frequency on growth process of plasma electrolytic oxidation coating[J]. Mater Chem Phys 2012; 132: 909–915.

DOI: 10.1016/j.matchemphys.2011.12.032

[7] Bala Srinivasan P, Liang J, Blawert C, Stormer M, Dietzel W. Effect of current density on the microstructure and corrosion behaviour of plasma electrolytic oxidation treated AM50 magnesium alloy[J]. Appl Surf Sci 2009(255): 4212–4218.

DOI: 10.1016/j.apsusc.2008.11.008

[8] R.F. Zhang, S.F. Zhang, S.W. Duo, Influence of phytic acid concentration on coating properties obtained by MAO treatment on magnesium alloys [J]. Appl. Surf. Sci. 2009, Vol. 255 : 7893~7897.

DOI: 10.1016/j.apsusc.2009.04.145